Thursday

July 31, 2014

July 31, 2014

Number of results: 27,862

**Physics**

Candona strikes a 0.055-kg golf ball with a force of 260 N. If the ball moves with a velocity of 65 m/s, calculate the time the ball is in contact with the club.
*December 9, 2011 by HELP*

**Science**

A ball is dropped from a height of 10m .If the energy of ball reduces by 40% after striking the ground, how much high can the ball bounce back?
*February 25, 2012 by Sharma*

**Physics ~ A 2.0-kg ball is**

A 2.0-kg ball is travelling east at 8.0 m/s when it has a perfectly elastic head-on collision with a 3.0-kg ball traveling west at 10.0 m/s. What are the final velocities of the two balls?
*October 29, 2012 by Booker Perry *

**physics**

a ball is dropped from a tower of height 5 m. it accelerates uniformly at 10m/s .if mass of the ball is 2 kg ,find the momentum transferred by a ball to the ground on striking.
*October 9, 2013 by TINA*

**physics**

An object falling under the pull of gravity is acted upon by a frictional force of air resistance. The magnitude of this force is approximately proportional to the speed of the object, which can be written as f = bv. Assume that b = 14 kg/s and m = 41 kg. (a) What is the ...
*February 28, 2011 by polo Q*

**physics**

An object falling under the pull of gravity is acted upon by a frictional force of air resistance. The magnitude of this force is approximately proportional to the speed of the object, which can be written as f = bv. Assume b = 16 kg/s and m = 58 kg. (a) What is the terminal ...
*September 29, 2012 by Anonymous*

**physics**

three dimensional identical balls 1,2 and 3 are placed on a straight line at a separation of 10m between balls . initially they are at rest. ball 1 is given a velocity of 10m/s towards ball 2. collision between ball 1 and 2 is inelastic with e=0.5 . but collision between ball ...
*January 16, 2011 by sreeram*

**physics**

three dimensional identical balls 1,2 and 3 are placed on a straight line at a separation of 10m between balls . initially they are at rest. ball 1 is given a velocity of 10m/s towards ball 2. collision between ball 1 and 2 is inelastic with e=0.5 . but collision between ball ...
*January 16, 2011 by mackson*

**Physics**

A 3.6 kg ball strikes a wall with a velocity of 9.3 m/s. The ball bounces off with a velocity of 7.9 m/s in the opposite direction. If the ball is in contact with the wall for 0.4 seconds, what is the constant force exerted on the ball by the wall?
*March 25, 2013 by Sam*

**algebra**

A 0.5 kg ball is thrown vertically upward at a speed of 25 m/s. Its velocity, v(t) (in m/s), at time, t (in seconds), is given by v(t)= 25-9.8t Its kinetic energy, K(v) (in Joules), is given by K(v)=0.5v^2. Express the ball's kinetic energy as a function of time, K(t). K(t)=0....
*February 11, 2007 by Shay*

**SCIENCE; Physics**

A ball is dropped from a cliff amd has an acceleration of 9.8 meters per second squared. How long will it take the ball to reach a speed of 24.5 meters per second squared (m/s^2) ?
*September 28, 2011 by Adria*

**physics**

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.96 km/s at an initial inclination of 48.2◦ to the horizontal. The acceleration of gravity is 9.8 m/s2 . How far away did the shell hit? Answer in...
*October 20, 2010 by Anonymous*

**Physics**

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.11 km/s at an initial inclination of 39.4◦ to the horizontal. The acceleration of gravity is 9.8 m/s2 . How far away did the shell hit? Answer in...
*November 22, 2011 by Anonymous*

**Physics**

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.11 km/s at an initial inclination of 39.4◦ to the horizontal. The acceleration of gravity is 9.8 m/s2 . How far away did the shell hit? Answer in...
*November 22, 2011 by Anonymous*

**physics - energy question**

A simple pendulum, 2.0 m in length, is released with a push when the support string is at an angle of 25° from the vertical. If the initial speed of the suspended mass is 1.2 m/s when at the release point, what is its speed at the bottom of the swing? (g = 9.8 m/s2). i dont ...
*March 26, 2008 by icy*

**ap physics**

can you check my answers? 2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? defend your answer? -more work is required to bring a fully loaded truck up to a given speed because it is doing more work since it is fully...
*October 16, 2007 by Elisabeth*

**The defects of ball mill**

The Ball Mill faults: (1) work efficiency is low, the power consumption unit. (2) the ball mill barrel rotational speed is low (about 15 ~ 27 r/min), if you use ordinary motor that. The average all need equipped with expensive reducer. (3) grinding medium in the impact and ...
*June 13, 2013 by selina*

**physics**

a 120kg ball moving at 18m/s strikes a wall perpendicularly and rebounds straight back at 12m/s. after the initial contact, the centre of the ball moves 0.27cm closer to the wall. Assuming uniform deceleration, show that the time of the contact is 0.00075s. How large an ...
*September 30, 2007 by kale*

**Physics**

A small ball rolls horizontally off the edge of a tabletop of height h. It strikes the floor a distance x horizontally away from the edge of the table. (Use any variable or symbol stated above along with the following as necessary: g.) (a) How long is the ball in the air? t...
*February 4, 2013 by Rachel*

**Physics (Algebra-based)**

A barefoot field-goal kicker imparts a speed of 35 m/s to a football initially at rest. If the football has a mass of 0.39 kg and the time of contact with the ball is 0.038 s, what is the force exerted by the ball on the kicker’s foot? I tried the formula F=(m(vf-vi))/change ...
*April 17, 2013 by Becky*

**Physics**

To stop a car, you require first a certain reaction time to begin braking. Then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 80.0 km/h, and 24.4 m when the ...
*October 3, 2010 by Bob*

**physics**

Two stones, A and B, are thrown horizontally from the top of a cliff. Stone A has an initial speed of 15 meters per second and stone B has an initial speed of 30 meters per second. Compared to the time it takes stone A to reach the ground, the time it takes stone B to reach ...
*November 18, 2013 by Anonymous*

**physics**

a cannon with a mass of 1200 kilograms is positioned at the edge of a cliff where it fires a 100 kilogram cannonball horizontally. The cannonballs initial speed is 35 meters per second. What is the recoil of speed of the cannon.
*April 4, 2013 by lauren*

**Science**

A golf ball and a ping-pong ball are dropped in a vacuum chamber. When they have fallen halfway down, they have the same... A.speed B.potential energy C.kinetic energy D.Rest Energy my thought is that its c, kinetic energy...but i'm not 100% sure
*January 23, 2007 by Tammy*

**physics**

A ball is thrown vertically upward with a speed of +13.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity when it returns to the ...
*September 15, 2011 by ashley*

**physics**

A ball is thrown vertically upward with a speed of +10.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is its velocity when it returns ...
*January 22, 2012 by seanso*

**physics**

A ball is thrown vertically upward with a speed of +10.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is its velocity when it returns ...
*January 23, 2012 by seanso*

**physics**

A ball is thrown vertically upward with a speed of 19.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is its velocity when it returns to...
*August 30, 2012 by roger*

**Physics**

A ball is thrown vertically upward with a speed of 15.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity when it returns to the ...
*September 21, 2012 by Kelly*

**physics**

In preparation for a demonstration on conservation of energy, a professor attaches a 7.2-kg bowling ball to a 3.4-m-long rope. He pulls the ball 23° away from the vertical and holds the ball while he discusses the physics principles involved. Assume that the force he exerts on...
*April 6, 2011 by Anonymous*

**Physics**

A shell is fired from the ground with an initial speed of 1.68 103 m/s at an initial angle of 37° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. m (b) Find the amount of time the shell is in motion. s
*October 5, 2011 by Sydney*

**physics**

A shell is fired from the ground with an initial speed of 1.58 103 m/s at an initial angle of 31° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. m (b) Find the amount of time the shell is in motion. s
*November 18, 2012 by mel*

**physics**

A shell is fired from the ground with an initial speed of 1.54 103 m/s at an initial angle of 46° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. m (b) Find the amount of time the shell is in motion. s
*December 13, 2012 by Anonymous*

**Math(Please help, thank you)**

For an experiement to test elastic collision, ball 2 was at rest and ball 1 was released from a certain height and distance and hit ball 2. A set of measurements were collected which was v1 and v2 prime for each ball. I need to calculate the kinetic energy before and after ...
*October 5, 2012 by Hannah*

**Physics**

A hockey puck slides with an initial speed of 43.2 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.036, what is the speed of the puck after 10.4 s?
*September 11, 2011 by Anon*

**physics**

a .300 kg baseball is thrown at a speed of 6.5m/s. the batter hits the ball and it flies into the outfield at a speed of 19.2 m/s. How much work is done into hitting the baseball
*January 22, 2012 by jay*

**Physics**

a 78kg hockey player standing on frictionless ice throws a 6.0kg bowling ball horizontally with a speed of 3.0m/s. With what speed does the hockey player recoil?
*April 26, 2012 by Sarah*

**Physics**

A shell is fired from the ground with an initial speed of 1.54 ✕ 103 m/s at an initial angle of 52° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. (b) Find the amount of time the shell is in motion.
*May 31, 2014 by anonymous*

**physics**

On Earth a baseball player can hit a ball 120 m by giving it an initial angle of 45° to the horizontal. Take the acceleration due to gravity as g=10 ms^-2 Suppose the batter repeats this exercise in a space 'habitat' that has the form of a circular cylinder of radius R = 10 km...
*December 2, 2013 by Yasin*

**Physics**

A 1.5 kg ball strikes a wall with a velocity of 7.9 m/s to the left. The ball bounces off with a velocity of 6.7 m/s to the right. If the ball is in contact with the wall for 0.21 s, what is the constant force exerted on the ball by the wall?
*December 8, 2011 by Henry*

**Physics**

A 1.5 kg ball strikes a wall with a velocity of 7.9 m/s to the left. The ball bounces off with a velocity of 6.7 m/s to the right. If the ball is in contact with the wall for 0.21 s, what is the constant force exerted on the ball by the wall?
*December 8, 2011 by Henry*

**physics**

A 2.7 kg ball strikes a wall with a velocity of 7.8 m/s to the left. The ball bounces off with a velocity of 6.6 m/s to the right. If the ball is in contact with the wall for 0.19 s, what is the constant force exerted on the ball by the wall?
*November 8, 2012 by Brandon*

**Physics**

A 1.7 kg ball strikes a wall with a velocity of 7.7 m/s to the left. The ball bounces off with a velocity of 6.5 m/s to the right. If the ball is in contact with the wall for 0.17 s, what is the constant force exerted on the ball by the wall?
*December 16, 2013 by Anonymous*

**Physics**

Samma Sosa hit a ball at 40 m/s at a 22 degree angle. Find the following: Time the ball was in the air Horizontal distance Maximum height of the ball
*November 18, 2008 by Anonymous*

**Math**

In a rack of 15 billiard balls and one ball is selected at random what are the odds in favor it being a ball other than the 8 ball. I thought it would be 1/15 but I am not sure. Anyone help me on this?
*April 19, 2011 by Gerri*

**physics**

A 5.6-kg bowling ball is accelerated from rest to a velocity of 17 m/s as the bowler covers 5.0 m of approach before releasing the ball. What force is exerted on the ball during this time?
*November 1, 2011 by Eddie*

**Maths nd science**

A ball is thrown vertically upwards.It takes 4 s for the ball to return to the thrower's hand now what is thb maximum height reached by the ball.
*January 17, 2013 by Felicia*

**Physics**

A 3.23 kg ball is attached to a ceiling by a 1.31 m long string. The height of the room is 5.75 m What is the gravitational potential energy of the ball relative to a point at the same elevation as the ball?
*March 10, 2013 by Anonymous*

**Physics**

A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?
*March 14, 2014 by Anonymous*

**physics**

At a certain instant a ball passes location < 11, 10, -16 > m. In the next 3 seconds, the ball's average velocity is < -8, 37, 30 > m/s. At the end of this 3 second time interval, what is the height y of the ball?
*June 17, 2014 by rebekah*

**Physics**

Suppose you throw a 0.054-kg ball with a speed of 11.5 m/s and at an angle of 31.8° above the horizontal from a building 13.1 m high. (a) What will be its kinetic energy when it hits the ground? (b) What will be its speed when it hits the ground?
*June 1, 2012 by James*

**Physics**

Suppose you throw a 0.058-kg ball with a speed of 11.0 m/s and at an angle of 31.5° above the horizontal from a building 12.3 m high. (a) What will be its kinetic energy when it hits the ground? (b) What will be its speed when it hits the ground?
*September 26, 2012 by Ray*

**physics**

A hot stell ball of mass 1 kg is dropped into a 4 L bucket of water at room temperature (70 degrees F). If the system reaches an equilibrium temperature of 320 K, what was the initial temperature of the steel ball before it was dropped into the water? Cp of steel = 490 J/kg ...
*March 19, 2011 by Meghan*

**Physics**

A rock dropped from a small bridge encounters no air resistance and hits the pond below 1.0 s later. If it had been thrown horizontally with a speed of 10m/s , then it would have hit the water A. more than 1.0s later, since it has a greater distance to travel. B. 1.0s later, ...
*September 10, 2006 by JC*

**Pre-Ap Physics**

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.65 km/s at an initial inclination of 41.9◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . How far away did the shell hit? Answer ...
*September 24, 2012 by Maria*

**science**

A small ball with a mass of 30.0 g and a charge of −0.200 μC is suspended from the ceiling by a string. The ball hangs at a distance of 5.00 cm above an insulating floor. If a second small ball with a mass of 50.0 g and a charge of 0.400 μC is rolled directly ...
*September 17, 2012 by alia*

**physics**

A small ball with a mass of 30.0 g and a charge of −0.200 μC is suspended from the ceiling by a string. The ball hangs at a distance of 5.00 cm above an insulating floor. If a second small ball with a mass of 50.0 g and a charge of 0.400 μC is rolled directly ...
*September 17, 2012 by alia*

**algebra I**

drop a ball at 30000 feet at 30 feet per second and a ball bounces up at 40 feet per second what height do they meet and what speed
*February 16, 2014 by jon*

**Physics**

A neutral ball is suspended by a string. A positively charged insulating rod is placed near the ball, which is observed to be attracted to the rod. Why is this? 1. The ball becomes negatively charged by induction. 2. The string is not a perfect conductor. 3. The number of ...
*July 23, 2013 by Lynn*

**math**

a spherical ball requires approximately 900cm2 of material in order to make it. Find the volume of the ball : The volume is 2579.325cm3 NOW The ball is sold in a rectangular prism shaped box. What percentage of the volume of the box is taken up by the ball? Please help me =)
*September 4, 2008 by cynthia*

**Physics**

A thing rod of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass 5.00kg is attached to the other end. The rod is pulled aside through an angle 30.0 degrees and released. What is the speed of the ball at the lowest ...
*December 9, 2010 by Andrea*

**physics**

1.In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.56 x 10*-17 N during the first 1.87 cm of tube's length; then they move at essentially constant velocity another 45.0 cm before hitting the screen. Find the speed of the ...
*September 24, 2008 by Sandhya*

**College Physics**

A playground is on the flat roof of a city school, 5.2 m above the street below (see figure). The vertical wall of the building is h = 6.50 m high, forming a 1.3-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by launching...
*February 1, 2010 by Katie*

**physics**

A student is skateboarding down a ramp that is 5.5 m long and inclined at 19° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 2.9 m/s. Neglect friction and find the speed at the bottom of the ramp.
*February 19, 2011 by Julius *

**College Physics**

A hockey puck slides with an initial speed of 43.2 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.036, what is the speed of the puck after 10.4 s?
*September 11, 2011 by Anon*

**physics**

A student is skateboarding down a ramp that is 8.48 m long and inclined at 16.4° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 3.94 m/s. Neglect friction and find the speed at the bottom of the ramp.
*October 3, 2012 by Sally*

**Physics**

A student is skateboarding down a ramp that is 8.81 m long and inclined at 27.3 ° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 2.58 m/s. Neglect friction and find the speed at the bottom of the ramp.
*December 12, 2012 by shine*

**Physics**

A student is skateboarding down a ramp that is 8.33 m long and inclined at 24.5° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 4.12 m/s. Neglect friction and find the speed at the bottom of the ramp.
*July 8, 2014 by Robert*

**Physics**

A 1.34‒kg ball is attached to a rigid vertical rod by means of two massless strings each 1.70 m long. The strings are attached to the rod at points 1.70 m apart. The system is rotating about the axis of the rod, both strings being taut and forming an equilateral triangle...
*February 23, 2014 by Chrxeyshthoufov*

**physics**

A baseball bat makes contact with a ball 1.05 meters above the ground and the ball moves away at a 41.5 degree angle from the horizontal. It's a homer!! The ball lands in the bleachers 133.5 meters away from home plate, 4.1 meters above the ground. How long was the ball in the...
*September 25, 2008 by shan*

**math**

Okay. So i'm doing this project for my geometry class about different sports, soccer, baseball, basketball, bowling, golf, volleyball and pool. I have to find the surface area, volume, diameter, circumference, and radius of each of the balls. I got a circumference for each one...
*May 23, 2007 by Emily*

**dynamics**

traveling with an initial speed of 70km/h. a car accelerates at 6000km/hr^2 along a straight road. how long will it take to reach a speed of 120km/hr? also, through what distance does the car travel during this time.?
*April 18, 2012 by chanz11*

**Physics**

A ball with a mass of 0.50 kilograms is moving at a speed of 1.8 meters/second along the positive x-axis. It collides with another ball of the same mass travelling at a speed of 2.0 meters/second toward the positive y-axis. Both balls then start moving together. What is the ...
*March 13, 2013 by fredrick*

**Physics**

A cannon is mounted on a truck that moves forward at a speed of 5 m/s. The operator wants to launch a ball from a cannon so the ball goes as far as possible before hitting the level surface. The muzzle velocity of the cannon is 50 m/s. What angle from the horizontal should the...
*February 17, 2013 by Brian*

**algebra**

A baseball player hits a ball toward the outfield. The height h of the ball in feet is modeled by h(t) = -16t2 + 22t + 3, where t is the time in seconds. In addition, the function d(t) = 85t models the horizontal distance d traveled by the ball. If no one catches the ball, how...
*April 1, 2014 by megan*

**Physics**

A ball is throwing downward with an initial velocity of 10 m/sec. If the final velocity is 20 m/s, what is the time?
*March 4, 2012 by Mina*

**Physics-check**

can you check my answers? 2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? defend your answer? -more work is required to bring a fully loaded truck up to a given speed because it is doing more work since it is fully...
*October 17, 2007 by Elisabeth*

**math-help!**

A croquet ball weighs 460 grams. Together a golf ball and a croquet ball weigh the same as ll golf balls. What does the golf bal weigh? I would be able to figure out the answer, but they're asking me to write the eqaution, and I always do it wrong! Let C be the croquet ball's ...
*October 18, 2006 by pinkpolkadots*

**child developement**

A child throws a ball with speed and accuracy when he throws a ball to his teacher but his throws are slower and less accurate when plays with a group of friends. This difference is explained by A. classical stage theory B. probility theory C. locomotion-x theory D, Piaget,s ...
*April 28, 2012 by jane*

**calculus**

a ball is thrown upward at 96 feet per second from the top of a 100 foot building. 1.when will the ball obtain maximum height 2. when will the ball hit the ground?
*October 24, 2011 by chris*

**physics**

the field just outside a 20 cm-radius metal ball is 5x10^(2) N/C outwards. a) what is the flux through the surface of the ball? b) what is the net charge enclosed inside the ball?
*May 2, 2012 by marcy*

**I need help (Physics)**

A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?
*March 14, 2014 by Help please*

**Physics**

A 15-g bullet is fired horizontally into a 3.000-kg block of wood suspended by a long cord. The bullet sticks in the block. Compute the speed of the bullet if the impact causes the block to swing 10 cm above its initial level. Initial Velocity of bullet=19.1m/s
*July 19, 2010 by Lony*

**math**

a ball of radius 1 is dropped into a V-shaped gutter. The ball touches the gutter's sides at the ball's equator. If the shortest distance from the surface of the ball to the vertex of teh gutter is 1, what is the angle formed by the sides of the gutter?
*November 7, 2010 by bob*

**MATH**

a ball of radius 1 is dropped into a V-shaped gutter. The ball touches the gutter's sides at the ball's equator. If the shortest distance from the surface of the ball to the vertex of teh gutter is 1, what is the angle formed by the sides of the gutter?
*November 7, 2010 by bob*

**Physics**

Four balls are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 95 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 56.0 N (between ball A & B), T2 = 46.7 N (between ball B & C), and ...
*February 6, 2007 by COFFEE*

**Physics**

A juggler has a set of balls that she can toss into the air. If it takes her 0.2 s to transfer a ball from the receiving hand to the launch hand and she is able to throw a given ball straight up with a maximum speed of 10 m/s how many balls can she successfully juggle at any ...
*April 29, 2012 by Bob *

**math**

a ball is dropped from a height of 5m. after each bounce, the ball rises to 45% of its previous height. what the total vertical distance that the ball has travelled after it has hit the ground for for the 6th time? what are the formulas? because the ball bounces twice each time
*November 18, 2008 by tee*

**Physics**

A student is skateboarding down a ramp that is 5.38 m long and inclined at 19.4 degrees with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp 2.52 m/s. Neglect friction and find the speed at the bottom of the ramp in m/s.
*December 19, 2012 by Toung*

**physics**

A student is skateboarding down a ramp that is 6.88 m long and inclined at 16.9 degrees with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp 2.54 m/s. Neglect friction and find the speed at the bottom of the ramp in m/s.
*December 19, 2012 by dee*

**Physics**

Now assume that the pitcher in Part D throws a 0.145-kg baseball parallel to the ground with a speed of 32 m/s in the +x direction. The batter then hits the ball so it goes directly back to the pitcher along the same straight line. What is the ball's velocity just after ...
*October 24, 2010 by Eden*

**physics**

here is my question: A bullet with a mass of 6.00 g is fired through a 1.25 kg block of wood on a frictionless surface. The initial speed of the bullet is 896 m/s, and the speed of the bullet after it exits the block is 435 m/s. At what speed does the block move after the ...
*March 11, 2009 by physics*

**physics**

A 8kg ball is thrown up with an initial speed of 20m/s. Suppose there is a constant air resistence of 30N opposing the motion during its entire up and down path. How long will it take to get to the highest point in its path? how high is the highest point? How much work was ...
*December 20, 2010 by dipset*

**Physics**

A place kicker must kick the football from a point 34.2 m from the goal and clear a bar 3.00 m above the ground. The ball leaves the ground with a speed of 20.0 m/s at an angle of 53.0 degrees above the horizontal. (a) By how much (m) does the ball clear (positive value) or ...
*August 6, 2011 by waqas*

**physics(please help)**

There are a large ball and on top of it a small ball, when they both thrown together to high h, a large ball returns to hight h. To what hight does small ball reflect? (using hoec)
*February 26, 2008 by *CAREY~**

**physics**

A rubber ball of mass 18.0 g is dropped from a height of 1.75 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.55 m. What impulse was applied to the ball during the collision?
*October 16, 2011 by Kellie*

**physics**

A rubber ball of mass 19.5 g is dropped from a height of 1.85 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.55 m. What impulse was applied to the ball during the collision?
*February 24, 2012 by Tyler*

**Physics**

A rubber ball of mass 41.5 g is dropped from a height of 1.75 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.55 m. What impulse was applied to the ball during the collision?
*February 24, 2012 by Anonymous*

**Physics**

A 2.5kg ball strikes a wall with a velocity of 8.5m/s to the left. The ball bounces off the wall with a velocity of 7.5m/s to the right. If the ball is in contact with the wall for .25s, what is the constant force exerted on the ball by the wall?
*May 9, 2012 by Sarah*

**physics**

When 2 balls collide head on where one ball is moving and one ball is stationary, it is possible that the moving ball will transfer its entire motion to the stationary ball. This most likely happen when?
*September 10, 2012 by Janelle*

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