Friday

April 25, 2014

April 25, 2014

Number of results: 6,801

**physics**

A 6840 N wrecking ball hangs from the end of a steel cable. What is the net force acting on the wrecking ball if the cable snaps? equation please and explain
*Wednesday, October 13, 2010 at 5:56pm by Bansnoob*

**physics**

A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway is 1.6 seconds. Find the time it takes for the ball to fall from rest all the way to the ground.
*Tuesday, September 16, 2008 at 10:17pm by nj*

**physics**

A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fail halfway to the ground is 1.2s. Find the time it takes for the ball to fall from rest all the way to the ground. Can anyone give me some hints to do this? ...
*Saturday, October 6, 2007 at 3:50pm by ajo*

**physics**

A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway to the ground is 4.36 s. Find the time it takes for the ball to fall from rest all the way to the ground.
*Monday, February 7, 2011 at 11:37am by shaknocka*

**physics**

A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway to the ground is 1.4 s. Find the time it takes for the ball to fall from rest all the way to the ground.
*Monday, October 3, 2011 at 7:07pm by Anonymous*

**Physics**

A 1200 wrecking ball hangs from a 20 -long cable. The ball is pulled back until the cable makes an angle of 30.0 with the vertical.By how much has the gravitational potential energy of the ball changed?
*Saturday, April 16, 2011 at 6:17pm by Mike aloe*

**physics**

A 1100 wrecking ball hangs from a 10 -long cable. The ball is pulled back until the cable makes an angle of 28.0 with the vertical.By how much has the gravitational potential energy of the ball changed?
*Monday, January 28, 2013 at 9:31pm by Mak*

**physics**

a 1100 kg wrecking ball hangs from a16m long cable. the ball is pulled back until the cable makes an angle of 17 with the vertical. By how much has the gravitational potential energy of the ball changed?
*Monday, November 26, 2012 at 6:17pm by kelly *

** college physics**

A 1100 kg wrecking ball hangs from a 14m-long cable. The ball is pulled back until the cable makes an angle of 17.0 degrees with the vertical.By how much has the gravitational potential energy of the ball changed?
*Wednesday, June 22, 2011 at 5:22pm by Bethany*

**Science**

WHen a wrecking ball hits a wall, it is usually moving at about 10 km/h, which is not very fast. How can this ball knock down a solid wall?
*Thursday, January 19, 2012 at 3:39pm by Micheal*

**Pre-Calc**

A wrecking ball attached to a crane swings back and forth. The distance that the ball moves to the left and right of its resting position with respect to time is represented by the following graph.
*Friday, November 15, 2013 at 9:12pm by lisa*

**college physics**

A 1500 wrecking ball hangs from a 16 -long cable. The ball is pulled back until the cable makes an angle of 23.0 with the vertical.
*Thursday, February 16, 2012 at 11:39pm by stew*

**Physics Help**

A ball of mass 1.76 kg is tied to a string of length 4.19 m as shown in Figure P6.50. The ball is initially hanging vertically and is given an initial velocity of 9.4 m/s in the horizontal direction. The ball then follows a circular arc as determined by the string. What is the...
*Monday, September 26, 2011 at 8:39pm by Kaylee*

**physics**

A wrecking ball (weight 4140 N) is supported by a boom, which may be assumed to be uniform and has a weight of 2550 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32 degrees, and ...
*Saturday, June 9, 2007 at 12:54pm by annie*

**math**

The diameter of a wrecking ball used to tear down buildings is 3.5 ft. What is the volume (to the nearest hundredth)? Is there enough information given? Do I use formuls of v=4/3*pi*r(squared) Hope it makes sense
*Thursday, June 14, 2012 at 9:36pm by Leo*

**physics**

Two pith balls below each have a mass of 5.0 g and equal charge. One pith ball is suspended by an insulating thread. The other is brought to x = 4.0 cm from the suspended ball. The suspended ball is now hanging with the thread forming an angle of 30.0° with the vertical. The ...
*Monday, February 8, 2010 at 1:45am by Adam*

**Physics**

A child tosses a baseball to his siter, who is hanging out the window of an apartment building. The ball's initial velocity is 18 m/s upward. (Ignore any horizontal motion) 1. How long will it take for the ball to reach its maximum height? 2. The sister catches the ball 3.0 ...
*Saturday, January 28, 2012 at 12:24am by DENISE*

**College Physics**

A charged particle is hanging from the side of a wall by means of an uncharged string. The wall has a negative charge producing a horizontal electric field. The particle has a mass of .01 Kg. and charge of -80(micro)C and is suspended by a string .3m long. The electric force ...
*Tuesday, October 11, 2011 at 4:19am by Adam*

**physics**

Two pith balls below each have a mass of 5.0 g and equal charge. One pith ball is suspended by an insulating thread. The other is brought to x = 4.0 cm from the suspended ball. The suspended ball is now hanging with the thread forming an angle of 30.0° with the vertical. The ...
*Monday, February 8, 2010 at 2:15am by Adam*

**Physics**

Two pith balls below each have a mass of 5.0 g and equal charge. One pith ball is suspended by an insulating thread. The other is brought to x = 4.0 cm from the suspended ball. The suspended ball is now hanging with the thread forming an angle of 30.0° with the vertical. The ...
*Monday, February 8, 2010 at 4:11pm by Adam*

**college physics**

a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force. a) chain with a weight of 2.5 N has a 1.0 N hanging weight b) chain with a weight of .5 N has a 1.0 N hanging weight c) stretched elastic band with negligible weight has a 1....
*Thursday, March 8, 2012 at 12:15pm by Amber*

**Physics **

a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force. a) chain with a weight of 2.5 N has a 1.0 N hanging weight b) chain with a weight of .5 N has a 1.0 N hanging weight c) stretched elastic band with negligible weight has a 1....
*Sunday, March 11, 2012 at 2:26pm by Brandon *

**Physics**

Two Balls of masses mA = 45 grams and mB = 65 grams are suspended as follows: both Balls are hanging by a 30 cm string and are vertically parallel to each other. The lighter ball is pulled away to a 66 degree angle with the vertical and is released, hitting the larger mass. a...
*Tuesday, April 9, 2013 at 7:37pm by Enzo *

**physics**

a positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread. after being charged once. the plates are disconnected from the battery. describe the behavior of the ball. (the plates are not touching nothing and the ball ...
*Wednesday, December 1, 2010 at 8:17am by maria*

**Science. 11th Grade Pre-AP Physics**

A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Thank you so much! Could you please...
*Friday, February 25, 2011 at 1:12pm by Angela*

**physics**

An 9.20kg ball, hanging from the ceiling by a light wire 115 long, is struck in an elastic collision by a 1.20kg ball moving horizontally at 6.00m/s just before the collision. Find the tension in the wire just after the collision.
*Wednesday, March 14, 2012 at 2:40pm by Anonymus*

**Physics**

A 6.00 kg ball (ball 1), moving to the right at a velocity of +1.00 m/s on a frictionless table, collides head-on with a stationary 7.50 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 m/s ball 2 m/s...
*Sunday, November 2, 2008 at 10:08pm by Brandon*

**physics please help**

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 ball 2 (b) ...
*Tuesday, November 2, 2010 at 10:44am by jason*

**[+] (+) [-] PHYSICS PRE-AP 11th GRADE**

A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Could you please describe the ...
*Friday, February 25, 2011 at 2:16pm by Angela*

**physics**

Jahna and Raul move onto the setup for experiment 2. They have been asked to determine both the mass of the rod and the mass of the hanging object. They know the length of the rod, the position of the hanging mass, anf the positions and readings of the scales. Determine the ...
*Monday, April 16, 2012 at 10:41am by Natasha*

**physics- still confused.**

A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Thank you so much! Could you please...
*Sunday, February 27, 2011 at 8:24pm by Angela here again*

**Physics**

A box of mass 1kg is placed on a table and is connected to a hanging mass m by a string strung over a pulley. If the coefficient of kinetic friction between the box and the table is .3 and the box slides at a constant speed of .5m/s what is the weight of the hanging mass? ...
*Wednesday, November 14, 2007 at 6:22pm by Andrea*

**physics**

A wrecking ball (weight = 4880 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3520 N. As the drawing below shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is θ1...
*Sunday, November 17, 2013 at 10:06am by ERsa*

**Physics**

Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far Ball 1 has fallen (to two decimal points) by the time Ball 2 is thrown.
*Wednesday, September 12, 2012 at 8:03pm by Ashley*

**physics**

A string is hanging from the rearview mirror of you car and a ball is at the end of this string. Suppose that your drive around a circular track at fixed speed. Which list below gives all the forces that act on the ball? A) tension and the force of gravity b) tension force of ...
*Saturday, November 21, 2009 at 6:26pm by jon*

**Physics**

Part 1: Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far apart Ball 1 and Ball 2 are after 5.02 seconds from when Ball 1 was ...
*Wednesday, September 12, 2012 at 8:14pm by Ashley*

**Physics**

Part 1: Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far apart Ball 1 and Ball 2 are after 5.02 seconds from when Ball 1 was ...
*Wednesday, September 12, 2012 at 8:20pm by Ashley*

**physics please help me**

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 = -.825 ball 2...
*Sunday, November 7, 2010 at 5:56pm by dan*

**Physics**

Two blocks are connected by a string, The smooth inclined surface makes an angle of 35 degrees with the horizontal, and the block on the incline has a mass of 5.7kg. The mass of the hanging block is m=3.2kg. Find the direction and magnitude of the hanging blocks acceleration? ...
*Tuesday, March 13, 2012 at 3:13pm by Priscilla*

**physics**

A 1.2kg object is placed on a frictionless table and is attached to a hanging mass using a light string over a frictionless pulley in a fletcher's trolley arrangement. The 1.20kg object accelerates along the table at 2.31m/s while the hanging object accelerates down at the ...
*Wednesday, April 3, 2013 at 7:53pm by maddi*

**physics please help**

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 ball 2 (b) ...
*Sunday, November 7, 2010 at 2:45pm by joshua*

**maths **

one bag contains 1 red ball,1 yellow ball, 1green ball and 1 blue ball the second bag contains 1 pink ball and 1 grey ball what is the sample space out come
*Thursday, January 19, 2012 at 12:31pm by Sue*

**physics**

A string is hanging from the rearview mirror of you car and a ball is at the end of this string. Suppose that you drive around a circular track at fixed speed. Which list below gives all the forces that act on the ball? A) tension and the force of gravity b) tension force of ...
*Monday, November 23, 2009 at 5:57pm by julia*

**physics**

A soccer game is played. A goal keepers kicks the ball 88m . If the ball had an elevation of 40 degree angle upon its departure calculate : a) the initial velocity of the ball// b) the max. height of the ball// c) the time of flight of the ball
*Monday, July 12, 2010 at 8:39pm by jon*

**physics**

A mobile is constructed from a thin rod of mass 50 g and length 50 cm. Two hanging masses are positioned at each end of the rod. The mass of one of the hanging masses is 100 g. What must be the mass of the other hanging mass so that the mobile is in static equilibrium with ...
*Saturday, December 4, 2010 at 5:29am by Qay*

**physics**

A mobile is constructed from a thin rod of mass 50 g and length 50 cm. Two hanging masses are positioned at each end of the rod. The mass of one of the hanging masses is 100 g. What must be the mass of the other hanging mass so that the mobile is in static equilibrium with the...
*Saturday, December 4, 2010 at 4:02pm by Qay*

**Physics**

A box of mass 1kg is placed on a table and is connected to a hanging mass m by a string strung over a pulley. If the coefficient of kinetic friction between the box and the table is .3 and the box slides at a constant speed of .5m/s what is the weight of the hanging mass? ...
*Wednesday, November 14, 2007 at 5:19pm by Andrea*

**physics**

consider a hanging sphere that is hanging through two strings attached to a rigid support. the mass of thesolid sphere is 7.5 kg while the tension in each diagonal string is 95 N. find the inclination angle
*Sunday, January 15, 2012 at 9:34am by Gen*

**physics**

A vertically hanging spring has a mass of 50 N hanging from it. Under these conditions, the spring stretches 10 cm. The spring is then placed on a horizontal table and stretched 20 cm. What force is required in the second scenario?
*Wednesday, July 18, 2012 at 2:35am by kyle*

**Physics Part 1**

Rick is playing billiards and hits the cue ball. It makes contact with the 8 ball head on. If before the collision the cue ball was travelling at 2.4 m/s and after the collision the 8 ball was traveling at 2.13 m/s. How fast and in what direction is the cue ball traveling? (...
*Saturday, November 9, 2013 at 7:27pm by CC*

**physics help**

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 ball 2 (b) ...
*Tuesday, November 9, 2010 at 9:36am by david*

**Physics**

A 0.421-kg ball has an elastic, head-on collision with a second ball that is initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic energy (ΔK/K) is ...
*Wednesday, June 6, 2012 at 9:04am by James*

**physics**

A ball rolls along a desktop with an uniform velocity of 3 m/s. What is the displacement after 10 seconds have passed? A ball is thrown upward with an initial velocity of 18 m/s? What is the maximum height the ball reaches if the ball is assumed to leave from the ground? &#...
*Tuesday, November 8, 2011 at 7:04pm by kim*

**physics**

A ball rolls along a desktop with an uniform velocity of 3 m/s. What is the displacement after 10 seconds have passed? A ball is thrown upward with an initial velocity of 18 m/s? What is the maximum height the ball reaches if the ball is assumed to leave from the ground? &#...
*Tuesday, November 8, 2011 at 7:12pm by kim*

**physics : HELP PLEASE**

A ball rolls along a desktop with an uniform velocity of 3 m/s. What is the displacement after 10 seconds have passed? A ball is thrown upward with an initial velocity of 18 m/s? What is the maximum height the ball reaches if the ball is assumed to leave from the ground? &#...
*Tuesday, November 8, 2011 at 8:01pm by kim*

**physics : HELP PLEASE**

A ball rolls along a desktop with an uniform velocity of 3 m/s. What is the displacement after 10 seconds have passed? A ball is thrown upward with an initial velocity of 18 m/s? What is the maximum height the ball reaches if the ball is assumed to leave from the ground? &#...
*Tuesday, November 8, 2011 at 8:20pm by kim*

**Physics**

A 50 kg skater at rest on a frictionless rink throws a 2 kg ball, giving the ball a velocity of 10 m/s. Which statement describes the skaters subsequent motion? Explain please. a. 0.4 m/s in the same direction as the ball. b. 0.4 m/s in the opposite direction of the ball. c. 2...
*Sunday, December 2, 2012 at 10:01pm by Alexa*

**Physics**

A 0.100 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a).what is the mass of the second ball? (b).What fraction of the original kinetic energy (ΔKE/KE) ...
*Sunday, January 2, 2011 at 8:34am by John *

**physics**

In a serve, a tennis player hits the ball horizontally. Neglect the effects of air resistance and the diameter of the ball. What minimum speed is required for the ball to clear the .9m net 15.0 m from the servier if the ball is launched from a height of 2.5 m? Where will the ...
*Monday, September 10, 2012 at 2:08pm by J.*

**Math-Trig**

A ball is tossed up in the air at an angle of 70 degrees with the horizontal and with an initial velocity of 36 ft/sec. What is the position of the ball 1 second after it is released? When will the ball hit the ground? What is the maximum height the ball will reach? How far in...
*Tuesday, May 28, 2013 at 2:47pm by Gianna *

**college physics**

A small ball of mass m is aligned above a larger ball of mass M = 0.79 kg (with a slight separation), and the two are dropped simultaneously from height h = 2.0 m. (Assume the radius of each ball is negligible relative to h). (a) If the larger ball rebounds elastically from ...
*Thursday, November 12, 2009 at 9:01pm by Steve*

**Physics**

Starting with an initial speed of 5.00 m/s at a height of 0.335 m, a 1.75-kg ball swings downward and strikes a 4.40-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.75-kg ball just before ...
*Sunday, March 23, 2014 at 7:36pm by Bo*

**Physics - Eqilibrium position of a spring-ball**

A 275g ball is resting on top of the spring that is mounted on the floor. You exert a force of 325N on the ball and it compresses the spring 44.5cm. If you release the ball from the position, how high above the equilibrium position of the spring-ball system will the ball rise?
*Tuesday, October 26, 2010 at 1:46am by Anonymous*

**PHYSICS (most is worked)**

A glass ball, ball A, of mass 6.0 g moves at a velocity of 18.0 cm/s. It collides with a second ball, ball B, of mass 8.0 g, moving along the same line of velocity of 11.0 cm/s. After the collision, ball A is still moving, but with a velocity of 10.0 cm/s. Ball A's original ...
*Monday, January 28, 2013 at 12:45pm by Jessica*

**Physics **

A 5 kg block is hanging from the top of an elevator if the elevator is accelerating upward at a rate of 3m/s/s, what is the tension in the rope that the block is hanging from?
*Sunday, November 24, 2013 at 9:33pm by Karen *

**Physics**

A 0.280 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic energy (ΔKE/KE) ...
*Wednesday, November 11, 2009 at 2:12pm by Ashley*

**6th grade**

A hole is punched in a kickball. Most of the air escapes and the ball collapses and shrinks. What happens to the ball? A. The volume of the ball decreases. B. The mass of the ball does not change.
*Wednesday, November 19, 2008 at 6:18pm by Britty*

**Science**

A 0.50 kg ball traveling at 6.0 m/s collides head-on with a 1.00 kg ball moving in the opposite direction at a velcity of -12.0 m/s. The 0.50 kg ball moves away at -14 m/s after the collision. Find the velocity of the second ball.
*Saturday, October 1, 2011 at 5:09pm by Clueless*

**physics**

A soccer player stops a ball that is moving across a field. Her foot is in contact with the ball for 0.3 s, during which time the ball's average acceleration is 12 m/s2. What was the ball's initial velocity?
*Tuesday, January 17, 2012 at 9:48am by yasmine*

**physics**

A soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is +30.0m/s. How long is the ball in the air? -What is the maximum height reached by the ball? -What is the horizontal distance traveled by the ball?
*Sunday, October 31, 2010 at 9:38pm by Esora*

**Physics**

A soccer ball is kicked with an initial speed of 27 m/s at an angle of 20° with respect to the horizontal. A) find the maximum height reached by the ball. B) find the speed of the ball when it is at the highest point on its trajectory. C) where does the ball land? That is what...
*Wednesday, June 20, 2012 at 11:34pm by Sierra*

**Physics**

A soccer ball is kicked with an initial speed of 23 m/s at an angle of 20° with respect to the horizontal.(a) Find the maximum height reached by the ball. (b) Find the speed of the ball when it is at the highest point on its trajectory. (c) Where does the ball land? That is, ...
*Saturday, October 20, 2012 at 2:53pm by Anne*

**physics **

a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached by the ball?
*Thursday, December 16, 2010 at 2:30pm by Anonymous*

**physics **

a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached by the ball?
*Thursday, December 16, 2010 at 2:31pm by Anonymous*

**physics **

a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached by the ball?
*Thursday, December 16, 2010 at 2:31pm by Anonymous*

**Science**

A golf ball was hit and projected in an angle of 60 degrees with the horizontal. if the initial velocity of the ball was 50m/s, calculate the following: a. the time the golf ball was in the air b. horizontal distance the ball traveled c. maximum height the ball reached
*Friday, January 4, 2013 at 9:36pm by YellowCorn*

**Physics please help cant figure this out**

starting with an initial speed of 5.00 m/s at a height of 0.265 m, a 1.75 kg ball swings downward and strikes a 4.45 kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.75 kg ball just before ...
*Friday, November 5, 2010 at 9:45am by joseph *

**Physics ~IMPULSE~**

a) A tennis racket a 450 N force on a 0.05 kg tennis ball over a 0.006 s time period. What is the impulse applied to the ball? b) A ball (0.5 kg) is thrown with a velocity of 15 m/s. A receiver catches the ball and brings it to rest is 0.02 s. a) What is the change in momentum...
*Saturday, February 16, 2013 at 11:14pm by Isis*

**physics**

A red ball of mass 0,6 kg,travelling at 5 m.s^-1 on a frictionless surface ,stikes a stationary green ball of mass 0,3 kg.after the collision,the red ball continues to move in its original direction at 2m.s^-1,while the green ball moves in front of the red ball. Determine the ...
*Wednesday, February 5, 2014 at 1:52pm by Mashego clinton*

**physics**

The fist ball is thrown up ward with avelocity of 20m/s at the same instant. The second ball is dropped at 40m hight from the first ball at what time the two ball collide each other?
*Tuesday, December 13, 2011 at 12:19pm by Abdu*

**Physics**

A ball is moving at 82 m/s when it hits a ball at rest which has a mass fours times as big as its own. The formally stationary ball leaves the collision with a speed of 7.5 m/s what is the final velocity of the first ball?
*Wednesday, March 21, 2012 at 3:53pm by Becky*

**physics**

A 156 gram 8 ball rolls across a pool table at 2 m/s when it collides with a 7 ball of equal mass rolling in the opposite direction at 1.5 m/s. The 8 ball bounces backwards at 1 m/s. Find the momentum of the 7 ball.
*Tuesday, June 12, 2012 at 5:00pm by someone*

**Physics**

A glass ball, ball A, of mass 6.0 g moves at a velocity of 19.0 cm/s. It collides with a second ball, ball B, of mass 9.0 g, moving along the same line of velocity of 11.0 cm/s. After the collison, ball A is still moving, but with a velocity of 8.0 cm/s. a) What was ball A's ...
*Wednesday, November 7, 2007 at 1:11pm by Jessica*

**physics please help**

A golfer, driving a golf ball off the tee, gives the ball a velocity of +40 m/s. The mass of the ball is 0.045 kg, and the duration of the impact with the golf club is 4.05E-3s. (a) What is the change in momentum of the ball? (b) Determine the average force applied to the ball...
*Friday, November 5, 2010 at 9:21am by jonathan*

**physics**

When a 0.045 kg golf ball takes off after being hit, its speed is 35 m/s. A)How much work is done on the ball by the club? B)Assume that the force of the golf club acts parallel to the motion of the ball and that the club is in contact with the ball for a distance of 0.007 m. ...
*Sunday, April 18, 2010 at 8:23pm by Will*

**Physics**

2. A golf ball is hit off the tee with an initial speed of 32 m/s at an angle of 29° with respect to the horizontal. a. What is the maximum height the ball reaches? b. What is the speed of the ball when it reaches the highest point? (give magnitude and direction) c. Where does...
*Monday, June 20, 2011 at 9:04pm by Hunter*

**physics**

true or false a small plastic ball has an excess negative charge on it. if a magnet is placed close to this ball, it will either attract or repel the ball, depending upon which pole is closer to the ball.
*Friday, March 9, 2012 at 7:35am by fatih*

**physics**

Each croquet ball in a set has a mass of 0.45 kg. The green ball, traveling at 12.6 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a friction- less surface and all collisions are head-on, find the final speed of the blue ball in each of the ...
*Tuesday, January 5, 2010 at 7:41pm by Anonymous*

**Physics. LAST PROBLEM!!**

A small metal ball with a mass of m = 82.5 g is attached to a string of length l = 1.72 m. It is held at an angle of θ = 58.5° with respect to the vertical. The ball is then released. When the rope is vertical, the ball collides head-on and perfectly elastically with an ...
*Tuesday, March 26, 2013 at 6:29pm by Elena*

**physics**

A large uniform "butcher block" rests on two supports(one support at the left end of the block) and has a weight hanging from its end. The block has a mass of 100 kg and a length of 2 meters. If the hanging weight is 59 newtons, what is the minimum value for L for the ...
*Thursday, October 14, 2010 at 10:34am by sandhya*

**physics**

A large uniform "butcher block" rests on two supports(one support at the left end of the block) and has a weight hanging from its end. The block has a mass of 100 kg and a length of 2 meters. If the hanging weight is 59 newtons, what is the minimum value for L for the ...
*Thursday, October 14, 2010 at 12:08pm by sandhya*

**Physics Check**

A ball is rolling across the top of a billiard table and slowly rolls to a stop. How would Galileo explain the motion of the ball as it stopped? a)The ball's natural state is at rest =b)The ball stopped because it ceased to be pushed c)The ball stopped due to external forces ...
*Monday, July 12, 2010 at 11:45am by Ariel*

**physics**

Two students are on a balcony 18.3 m above the street. One student throws a ball (ball 1) vertically downward at 12.2 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the balcony on the way down...
*Monday, August 29, 2011 at 2:47am by B*

**physics**

Two students are on a balcony 18.3 m above the street. One student throws a ball (ball 1) vertically downward at 12.2 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the balcony on the way down...
*Monday, August 29, 2011 at 2:51am by B*

**College Physics**

A golf ball is it with the initial velocity of 50.0 m/s at an angle of 55 degrees above the horizontal. (a) How high will the ball go? (b) What is the total time the ball is in the air? (c) How far will the ball travel horizontally before it hits the ground?
*Thursday, May 31, 2012 at 1:38am by Christine*

**physics**

6) The goalkeeper catches the ball flying by speed 30 m / s and stopped its movement in a period of 0.15 seconds . What force did he act on the ball, if we consider the stopping of the ball for constantly slow motion? Weight of the ball is 400 grams.
*Tuesday, August 20, 2013 at 4:45am by PAUL*

**Physics**

A golf club strikes a 0.061-kg golf ball in order to launch it from the tee. For simplicity, assume that the average net force applied to the ball acts parallel to the ball’s motion, has a magnitude of 7760 N, and is in contact with the ball for a distance of 0.014 m. With ...
*Wednesday, November 14, 2012 at 12:49pm by Emily*

**physics**

A ball mass 500g rolls at a velocity of 2m/s and hits another ball of mass 250g 1.What is the velocity of a small ball if the bigger ball immediately stops after collision? 2.What is the velocity of the bigger ball if it rolls in the same direction with the smaller ball at 0....
*Saturday, January 21, 2012 at 1:07pm by lufuno nemugumoni*

**physics**

There is a weight on a table, connected by a cord to another weight hanging over a pulley, as shown in the diagram below. The coefficient of kinetic friction for the weight on the table is 0:25. How fast does the hanging weight accelerate?
*Thursday, March 3, 2011 at 10:24am by bill*

**Physics**

A 50g tennis ball is thrown with a velocity of 12 m/s. It strikes a wall and rebounds with a velocity of 10 m/s. a) What is the ball's initial and final momentum? b) what is the impulse on the ball? c) Thje ball is in contact with the wall for .10 second. with what force did ...
*Monday, April 15, 2013 at 3:46pm by Jack*

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