Friday

April 25, 2014

April 25, 2014

Number of results: 7,612

**Physics **

A 2kg ball is attached to a 1.5m rope and is swung in a vertical circle. At the top of the swing the ball travels at 5 m/s. What is the tension in the rope?
*Sunday, February 5, 2012 at 12:51pm by Krystal*

**physics**

A 3.47 kg ball is attached to a ceiling by a 1.63 m long string. The height of the room is 5.59 m. What is the gravitational potential energy of the ball relative to the ceiling?
*Saturday, February 18, 2012 at 8:44pm by Gabe*

**physics**

wally sees a ball sitting on the floor.he kicks the ball across the floor. does he do any work?if not why?if so what energy change is occurring?
*Friday, June 1, 2012 at 3:55pm by lisa*

**Physics**

A golf ball has a mass of 0.05 kg and acquires a speed of 80.0 m/s when hit with a force of 3000 N. how long was the club in contact with the golf ball?
*Thursday, January 10, 2013 at 9:50pm by Rosa*

**southeast**

A ball is thrown downward with an initial velocity of 11 m/s. Using the approximate value of g = 10 m/s2, what is the velocity of the ball 1.6 seconds after it is released?
*Thursday, April 18, 2013 at 7:55pm by audra*

**Physics**

A ball is thrown horizontally at 20 m/s from the top of a cliff 50 meters high. How far from the base of the cliff does the ball strike the ground?
*Thursday, June 13, 2013 at 10:13am by Harvey*

**physics**

An canon ball is launched from ground level directly upward at 39.2 m/s. For how long is the canon ball at or above a height of 34.3 meters?
*Sunday, February 23, 2014 at 5:34am by Anonymous*

**physics**

A ball is projected upwards from a platform 8m above the ground,with an initial velocity of 3m/s.How long does it take for the ball to reach the ground.
*Monday, March 10, 2014 at 5:39am by pamela*

**Physics**

A ball is traveling down a straight track at 20 m/s. How fast will the ball's speed be after it climbs a hill in the track that is 15 m high?
*Friday, March 21, 2014 at 4:43pm by Eiban*

**Physics**

If a ball is being lifted at a constant speed, does this mean that acceleration is 0 and therefore F=ma=0 and therefore no work is done on the ball?
*Wednesday, April 8, 2009 at 6:24pm by Brigid*

**physics**

The centers of a 8 kg lead ball and a 100 g lead ball are separated by 13 cm. What gravitational force does each exert on the other?
*Wednesday, February 3, 2010 at 7:04pm by margaret*

**Science**

You throw a ball upward and then it falls back down. How does the velocity of the ball change as it rises and falls?
*Monday, March 29, 2010 at 4:22pm by Jenna*

**Physics**

The centers of a 13 kg lead ball and a 130 g lead ball are separated by 5.0 cm. What gravitational force does each exert on the other?
*Wednesday, October 27, 2010 at 6:54pm by mike*

**physics**

Will tosses a ball straight upward. Show that if the ball is tossed upward at 18m/s it will be in the air for less than 4s.
*Saturday, February 12, 2011 at 5:44pm by Daisha*

**physics**

A copper ball has a mass of 1kg.Calculate the radius of the ball,given that the density of copper is 8900kg m-3
*Sunday, May 15, 2011 at 4:06am by qay*

**physics**

Kimberly threw a ball downwards with an initial velocity of 8.0 m/s. What is in m/s2 the acceleration of the ball 1.3 seconds after she threw it?
*Friday, August 26, 2011 at 10:41pm by Jeon*

**Chemistry**

A horizontal force is applied to a 2-kg ball on a smooth table. The ball's speed is 6 m/s when it has gone 3 m. The magnitude of the force is
*Saturday, February 9, 2013 at 2:27pm by Anonymous*

**Math**

Hi, how would we solve a problem like this? The path of the ball for many golf shots can be modelled by a quadratic function. The path of a golf ball hit at an agle of about 10 degrees to the horizontal can be modelled by the function : h= -0.002d^2+0.4d where h is the height ...
*Friday, May 25, 2007 at 7:14am by Mark*

**Physics**

So for each of the statements we have to write true or rewrite the part in Caps to make the sentence true. I'm only stuck on a couple. 1. On a position-time graph, the average velocity equals the run MULTIPLIED by the rise. 2. A child drops a ball. The instantaneous velocity ...
*Thursday, February 3, 2011 at 10:06pm by Leanna*

**FINITE**

Assume that the box contains 9 balls: 1 red, 2 blue, and 6 yellow. As in the text, you draw one ball, note its color, and if it is yellow replace it. If it is not yellow you do not replace it. You then draw a second ball and note its color. 1) What is the probability that the...
*Wednesday, February 16, 2011 at 12:11am by Hil-hellpp!*

**Language Arts**

Neither forward could be stopped. These two lit up the scoreboard with 54 points. In fact, the Rockets scored so many points that the scoreboard shorted out trying to keep up. The Rockets were just too hot to handle. The best play of the game came in the fourth quarter. Stokes...
*Wednesday, March 23, 2011 at 9:05pm by Lisa*

**science**

in a baseball-hitting contest at the office picnic, five men participated named: Biff, Carl, Fred, Marty, and Tom. Their last names in alphabetical order are Jenkins, Keech, McNabb, Miller, and Winslow. The distance that each man hit the ball in feet are: 325, 300, 275, 250, ...
*Wednesday, September 26, 2007 at 8:40pm by angie*

**physics**

a pool player imports an impulse of 3.2 N*s to a stationary 0.25-kg cue ball with a cue stick what is the speed of the ball just after impact
*Monday, February 4, 2008 at 1:04pm by melissa*

**Physics (Motion)**

A ballon rises at 14m/s, a boy in the ballon throws a ball straight up at 24m/s. How much later does he catch the ball?
*Monday, January 19, 2009 at 4:28pm by Nick*

**Physics**

A ball is thrown vertically upward from a bridge 70 meters above the river with a velocity of 44 m/s. How high above the water did the ball rise?
*Wednesday, October 21, 2009 at 4:57pm by Hillary*

**chemistry**

A rigid ball that contained 25.0 liters of air at 22°C and 6.25 atm pressure was placed in an oven at a temperature of What was the new pressure inside the ball
*Thursday, July 8, 2010 at 9:09pm by Anonymous*

**physics**

A .4 kg ball is attached to a spring with spring constant 12 N/m. If the ball is pulled down .2m from the equilibriu, and released, what is its maximum speed while it oscilates?
*Thursday, September 16, 2010 at 11:38pm by Willie*

**physics**

A football punter accelerates a 0.58 kg foot- ball from rest to a speed of 7.0 m/s in 0.25 s.What constant force does the punter exert on the ball? Answer in units of
*Thursday, September 30, 2010 at 9:38pm by nafta herrera*

**physics**

A football punter accelerates a 0.54 kg foot- ball from rest to a speed of 8.7 m/s in 0.24 s. What constant force does the punter exert on the ball? Answer in units of N
*Thursday, October 21, 2010 at 11:59pm by C K*

**math**

ball thrown up from top of 96 foot high tower with initial velocity of 80 ft/s. when does ball reach max height and how high is it at that time?
*Monday, October 10, 2011 at 1:55pm by BK*

**math**

A wooden ball 7 inches in radius sinks to a depth of 10 inches in a river. Find the exposed area of the ball above the water.
*Tuesday, October 11, 2011 at 2:53am by michael*

**physics**

A 130g ball moving at 0.35m/s in the x-direction is subject to a 0.25N force in the - y-direction for 1.0s. Find the magnitude of the ball's momentum change.
*Tuesday, November 1, 2011 at 9:30pm by Don*

**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*

**physics**

a ball falls vertically onto a floor , with momentum p,and then bounces repeatedly.the co-efficient of restitution is e.the total momentum imparted by the ball is
*Wednesday, April 11, 2012 at 9:05am by srikala*

**science**

a 150 gm ball travelling at 30 m/s strikes the players hand and it stopped in0.06s.calculate the force exerrted by ball on hand
*Sunday, August 5, 2012 at 7:43pm by waseem*

**science**

A ball is thrown upward to 80m high, ball will be 2times at 80m during the interval of 6sec, accelaration -10 and find velocity?
*Tuesday, August 21, 2012 at 3:13am by Anonymous*

**science**

A ball is thrown upward to 80m high, ball will be 2times at 80m during the interval of 6sec, accelaration -10 and find velocity?
*Tuesday, August 21, 2012 at 5:01am by Anonymous*

**theory practice**

a child who moved from throwing a ball using only an elbow movement to throwing a ball is showing signs of --- development.
*Tuesday, September 18, 2012 at 3:13pm by Anonymous*

**Physics**

A ball rolls off the edge of a table that is 1.03 m high, and it strikes the floor at a point 1.40 m from the base of the the table. What is the initial speed in m/s of the ball?
*Tuesday, November 13, 2012 at 9:17pm by Asia*

**physics**

Ball A, moving with an initial speed of 3 m/s, has a head-on collision with another ball B at rest, which is twice as massive as A . What are the final velocities of A and B if the collision is elastic?
*Sunday, December 2, 2012 at 5:20pm by jay*

**math**

a ball tossed to a height of 4 meters rebounds 40% of its previous height. the total distance travelled by the ball by the time it comes to rest is?
*Sunday, March 10, 2013 at 6:31am by ross*

**science**

a ball is projected at an angel of 45 degree to the horizontal.if the horizontal range is 40m,the maximum height attained by the ball is- a)5m b)8m c)10m d012m
*Wednesday, May 22, 2013 at 4:28am by Mainak*

**physics**

a .2 kg ball is being swung around a verticle circle from a 1 m long string, the ball is traveling at 4 m/s counter -clockwise. what is the tension on the string?
*Sunday, December 8, 2013 at 9:38am by tim*

**phy**

A baseball is thrown horizontally from the top of a cliff 50 meters up. The initial velocity of the ball is 10 m/s. How far from the base of the cliff will the ball land?
*Wednesday, March 5, 2014 at 4:12pm by Anonymous*

**Honors Physics**

0.5 kg ball at the peak of the kick 16.6 m above the field had a kinetic energy of 35.4 J. How fast was the ball booted by the player on the field?
*Tuesday, March 18, 2014 at 9:15pm by Vinny*

**Physics**

A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 3.0 cm in bringing the block to a momentary...
*Wednesday, April 4, 2007 at 8:54pm by Mary*

**math**

A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. I don't get how to calculate it. Please help.
*Thursday, January 18, 2007 at 12:18pm by Shay*

**Physics**

I would like logic on how to solve this problem. A styrofoam ball covered with a conducting paint has a mass of 5.0 x 10 ^-3 kg and has a charge of 4.0 microcoulombs. What electric field directed upward will balance the weight of the ball?
*Tuesday, September 11, 2007 at 6:35pm by Stephanie*

**physics**

a cue stick strikes a stationary pool ball, exerting an average forece of 50 N over a time of 7 milliseconds. If the ball has mass .1kg, what speed does it have just after impact?
*Monday, January 14, 2008 at 3:20pm by Kristen*

**science**

hey how u all doin? If a ball is thrown vertically upwards into the air. What is the main energy conversion that takes place as the ball rises towards its maximum height? thanks carl
*Wednesday, December 10, 2008 at 10:34am by carl*

**physics**

A ball of mass 200 grams is whirled in a circle at the end of a strong 100 cm long rope whose breaking strength is 10 N. Neglecting gravity, the maximum speed of the ball is approximately.
*Saturday, September 11, 2010 at 3:47pm by Brittany*

**science**

A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. How far did the ball travel before hitting the ground? Round the answer to the nearest tenth of a meter.
*Tuesday, October 9, 2012 at 3:17pm by Miguel Hernandez*

**Mechanics_physics**

A soccer player kicked a ball at an angle of 37 degrees to the horizontal.if the range covered by the ball is 240.3m; calculate (a) The initial velocity of projection ? (b) The time of flight (c) The maximum height attained
*Friday, January 4, 2013 at 7:18pm by Precious*

**Physics please help!!**

A person who is 1.4 m tall throws a ball with a speed of 4.2 m/s at an angle of 25 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground? The acceleration due to gravity is 10 m/s2
*Sunday, February 3, 2013 at 12:41pm by Julia *

**Physics please help!!**

A person who is 1.4 m tall throws a ball with a speed of 4.2 m/s at an angle of 25 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground? The acceleration due to gravity is 10 m/s2
*Tuesday, February 5, 2013 at 7:38pm by Julia *

**Physics**

A 0.149-kg baseball is pitched a 40 m/s. The batter hits it horizontally to the pitcher at 56 m/s. Find the change in momentum of the ball. If the ball and bat were in contact 4.2 multiplied by 10-4 s, what would be the average force while they touched?
*Sunday, February 24, 2013 at 1:45pm by Anonymous*

**physics**

a player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 28 m/s. what is the maximum height attained by the ball? Round the answer to the nearest tenth of a meter.
*Tuesday, April 9, 2013 at 10:47am by faith*

**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*

**Physics**

A ball is rolled up a ramp from the point B shown below, with an initial speed of 5 miles per hour. It continues up the ramp to point C before it begins to roll back down. Throughout the motion up and down the ramp, the ball maintains a constant acceleration (this is always ...
*Friday, October 18, 2013 at 9:21pm by Luul*

**Chemistry**

What is the maximum weight (in grams) that 15 party balloons, each filled with 2 L of helium, can lift at STP? You can assume the weight of the balloon rubber is negligible and the outside air can be treated as pure nitrogen.
*Sunday, October 17, 2010 at 11:43pm by Erika*

**chemistry- thank you**

What is the maximum weight (in grams) that 15 party balloons, each filled with 2 L of helium, can lift at STP? You can assume the weight of the balloon rubber is negligible and the outside air can be treated as pure nitrogen.
*Sunday, October 31, 2010 at 12:07pm by Anthony*

**Pyhsic problem..Please help**

Fortune tellers use crystal balls to see the future. A fortune teller has a crystal ball with an index of refraction of 1.5 and diameter of 0.2 m. You sit on one side of the ball and the fortune teller sits on the other. She holds up a small red jewel on her side in the ...
*Tuesday, May 21, 2013 at 12:16pm by pyhsiclover*

**science**

A ball is traveling at a constant velocity of 50 m/s and has been traveling for over 2 minutes. What is the ball’s acceleration
*Sunday, March 8, 2009 at 3:15pm by sandy*

**physics**

The centers of a 11 kg lead ball and a 70 g lead ball are separated by 8.0 cm. What gravitational force does each exert on the other?
*Tuesday, September 29, 2009 at 3:36pm by Allison*

**physics**

pitcher throws a ball for 1.98m. the balls mass is .145kg. what is the force on the ball by the pitcher?
*Wednesday, October 6, 2010 at 3:00pm by lee*

**Physics**

A child rolls a ball on a level floor 3.4 m to another child. If the ball makes 9.0 revolutions, what is its diameter?
*Thursday, November 25, 2010 at 7:10pm by Kevin*

**10th grade**

a 5.0 kg bowling ball is rolling down the lane at 4.0 m/s. what is the kinetic energy of the bowling ball?
*Monday, December 6, 2010 at 9:53am by Brianna*

**Physics**

A ball is thrown straight up into the air with a velocity of +20.5 m/s. Find the velocity of the ball after 2.5 s.
*Sunday, June 19, 2011 at 4:53pm by Leasha*

**physics**

a ball falls from a height of 10metre. on rebounding it loses 30% energy. upto what height does the ball go?
*Tuesday, August 2, 2011 at 12:16am by gurpal*

**science**

A 5.0 kg bowling ball is rolling down the lane at 4.0 m/s. What is the kinetic energy of the bowling ball? a. 40 J b. 50 J c. 80 J d. 100 J
*Friday, November 22, 2013 at 1:13pm by like*

**Science**

What if you had paper clips, rubber bands, wood chips, straight pins, strips of aluminum foil, and glass beads? Using a property you've learned, classify these objects . Show your results in a table.
*Tuesday, January 19, 2010 at 3:21pm by Carlito*

**physics**

I did a projectile motion lab, predicting where a ball would land before actually dropping it. I have to answer this question: you accounted for variations in the velocity measurement in your range prediction. Are there other measurements you used which would affect the range ...
*Sunday, February 1, 2009 at 2:36pm by Kimberly*

**physics**

A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 12.0 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 60.0° with the horizontal and to be in line with the ...
*Thursday, February 17, 2011 at 10:46am by kia*

**physics**

A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 12.0 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 60.0° with the horizontal and to be in line with the ...
*Friday, February 18, 2011 at 1:44pm by Anonymous*

**physics**

A science student is riding on a flatcar of a train traveling along a straight, horizontal track at a constant speed of 12.8 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 67.0° with the horizontal and to be in line with the...
*Thursday, October 11, 2012 at 7:20pm by sedef*

**Math**

A ten-pin bowling ball has a volume of about 5274 cm3. A candlepin (8) bowling ball has a volume of about 48 in3. About how much greater is the volume of a ten-pin bowling ball than the volume of a candlepin bowling ball?
*Sunday, September 25, 2011 at 5:40pm by Caitlin*

**Physics**

A baseball is hit at 35.0m/s at an angle of 25.0 degrees to the horizontal. How high will the ball go> When will it reach that height? How far across the baseball field will the ball travel? Thanks.
*Thursday, March 20, 2008 at 3:13am by Tri*

**physics please help**

A soccer ball is kicked from the top of a 256 -foot building with an initial velocity of 6 ft/s. How far from the base of the building will the ball land?
*Sunday, October 19, 2008 at 4:05pm by carissa*

**physics!**

A soccer ball is kicked from the top of a 256 foot building with an initial velocity of 6 ft/s. What will the ball's velocity be at the instant before it strikes the ground?
*Sunday, October 19, 2008 at 9:07pm by carissa*

**high school physics**

a ball is thrown hirizontally from the roof of a building 45.0 meters tall and lands 24.0 meters from the base. what was the ball's initial speed
*Monday, October 20, 2008 at 6:46pm by Michael*

**physics**

(a) How long does it take for a golf ball to fall from rest for a distance of 12.5 m?in seconds (b) How far would the ball fall in twice that time?in meters
*Sunday, February 7, 2010 at 7:10pm by Eunice*

**Physics**

A soccer ball is kicked with a speed of 9.80 m/s at an angle of 25.0 degrees above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air?
*Tuesday, February 16, 2010 at 3:02pm by Abby*

**12th grade - Advanced Functions**

the height, h, in meters, of a gold ball t seconds after is is hit can be modelled by the function: h (t) = 4.9t^2 + 32t + 0.2. When is the height of the ball 15 m?
*Monday, July 19, 2010 at 9:54pm by Nish*

**physics**

The fastest major league pitcher throws a ball at 40.0. If he throws the ball horizontally, how far does it drop vertically on the 17.7 trip to home plate?
*Monday, September 20, 2010 at 6:51pm by kt*

**Physics**

A golfer hits a golf ball at an angle of 35° above horizontal. If the initial velocity is 55 m/s, how long does the ball soar before it hits the ground?
*Wednesday, December 1, 2010 at 4:11pm by Elaina*

**physics**

Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is traveling at 5.00 m/s when it reaches her. What was the speed of the ball when it left your hand if you released it at a height of 1.10 m?
*Monday, December 20, 2010 at 3:27pm by sabeen*

**physics**

A plastic ball has a volume of 300 cm3 and a mass of 30 g. What fraction of the ball's volume will float above the surface of a lake of fresh water?
*Sunday, February 13, 2011 at 2:55pm by shannon*

**physics**

A ball is shot horizontally at a speed of 10 m/s from a height of 2 meters. How long is the ball in the air and how far horizontally does it travel before it hits the ground?
*Wednesday, June 22, 2011 at 8:18am by Anonymous*

**phy**

A soccer ball is kicked with a speed of 9.15 m/s at an angle of 55.0^\circ above the horizontal. 1-If the ball lands at the same level from which it was kicked, how long was it in the air?
*Saturday, July 9, 2011 at 8:36pm by elin*

** Physics**

A ball is thrown straight up that it reaches a max height of 30 meter. How long did it take the ball to go up? How fast was it going when it was 10 meter high from the ground?
*Tuesday, July 19, 2011 at 6:26am by Rhea Mae*

**Calculus**

When Pal throws his beach ball straight up in the air, it's height h at time tis given by h=(-1/2)gt^2+v(sub 0). Find the velocity of the ball at time t.
*Wednesday, August 3, 2011 at 9:46am by Jordan*

**physics**

A small steel ball rolls off a table (1 meter high) with a speed of 2 m/s. Where should they place a can (15 cm high; diameter 10 cm) to catch the ball?
*Tuesday, October 18, 2011 at 4:03pm by mimi*

**physics**

A 1.2 kg ball is rolling down a friction free ramp at 21 m/s just before it hits level ground. How high was the ball when it started rolling?
*Wednesday, October 26, 2011 at 9:11pm by Lisa*

**physics**

A 1.2 kg ball is rolling down a friction free ramp at 21 m/s just before it hits level ground. How high was the ball when it started rolling?
*Wednesday, October 26, 2011 at 9:22pm by Lisa*

**physics**

the force acts on a 50g ball varies with time.if the initial velocity of the particles is 20m/s.what is the average acceleration of ball during this time?
*Sunday, January 8, 2012 at 11:17pm by jumana*

**physics**

the force acts on a 50g ball varies with time.if the initial velocity of the particles is 20m/s.what is the average acceleration of ball during this time?
*Sunday, January 8, 2012 at 11:19pm by jumana*

**physics**

the force acts on a 50g ball varies with time.if the initial velocity of the particles is 20m/s.what is the average acceleration of ball during this time?
*Sunday, January 8, 2012 at 11:19pm by jumana*

**physical science**

a soccer player kicks a ball straight up into the air at 6 m/s.ignore air resistance.what is the velocity of the ball at its highest point?
*Monday, January 23, 2012 at 2:51pm by faith*

**physical science**

a soccer player kicks a ball straight up into the air at 6 m/s.ignore air resistance.what is the velocity of the ball at its highest point?
*Monday, January 23, 2012 at 2:59pm by faith*

**physical science**

a soccer player kicks a ball straight up into the air at 6 m/s.ignore air resistance.what is the velocity of the ball at its highest point?
*Monday, January 23, 2012 at 3:01pm by faith*

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