Tuesday

September 2, 2014

September 2, 2014

Number of results: 28,103

**Physics**

Consider two cases in which the same ball is thrown against a wall with the same initial velocity. In case A, the ball sticks to the wall and does not bounce.In Case B, the ball bounces back with the same speed that it came with. a.) In which of the two cases is the change in ...
*July 7, 2014 by Anonymous-HELP! PLEASE!!*

**physics**

On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.9 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 42° above the horizontal. When ...
*October 19, 2010 by Anonymous*

**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 ...
*October 18, 2013 by Luul*

**physics**

A 45.5-g Super Ball traveling at 29.0 m/s bounces off a brick wall and rebounds at 19.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.15 ms, what is the magnitude of the average acceleration of the ball during this time interval?
*February 1, 2012 by Anonymous*

**physics**

A 47.0-g Super Ball traveling at 26.5 m/s bounces off a brick wall and rebounds at 20.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.10 ms, what is the magnitude of the average acceleration of the ball during this time interval?
*January 25, 2013 by tori*

**Physics**

A ball is fastened to one en of a 28 cm string, and the other end is held fixed to a support. The ball whirls in a horizontal circle. Find the speed of the ball in its circular path if the string makes an angle of 35 degrees to the vertical.
*May 16, 2013 by Andrea*

**Physics**

A uniform solid ball rolls smoothly along a floor, then up a ramp inclined at 13.5 degrees. It momentarily stops when it has rolled 1.65 m along the ramp. What was its initial speed?
*November 17, 2013 by Kelsey*

**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?
*October 10, 2011 by BK*

**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?
*March 5, 2014 by Anonymous*

**Math: Word Problem**

A ball is thrown upward from the top of a building which is 96ft tall w/ Initial velocity of 80 ft per sec. Distance s(ft) of ball from the ground after t sec is s=96+80t-16t^(2) 1) how many sec. will the ball pass the top of the building when it is coming down? How would I ...
*September 7, 2010 by Amy~*

**Physics**

A girl riding a bicycle at 2.16 m/s throws a tennis ball horizontally forward at a speed of 1.38 m/s relative to herself. The tennis ball lands 1.84 m horizontally from the point at which the girl released the ball. How high above the ground was the ball released?
*November 13, 2012 by Asia*

**phsyics**

A baseball is thrown straight up. The drag force is proportional to v^2. In terms of g, what is the y-component of the ball's acceleration when its speed is half its terminal speed and it is moving up? In terms of g, what is the y-component of the ball's acceleration when its ...
*September 23, 2010 by jane*

**Physics**

Velocity/instantaneous velocity question? In a demonstration a ball falls directly to the ground. Which of the following statements about this event is not correct? (Assume downward is the positive direction.) a)The average velocity during the first half of the fall is greater...
*October 7, 2012 by Lewis*

**spelling**

I need to write about soccer. I'm not a soccer playerand I do not know anything about it. Could you give me a couple topics for paragraphs. Thanks.
*January 29, 2009 by Anya*

**Physics**

A coin is tossed into the air with an initial speed of 8.00 m/s. In the absence of air resistance, how high does the coin go above its point of release It rises a distance h such that the potential energy gain (m g h) equals the initial kinetic energy loss ((1/2) m v^2 ). ...
*January 4, 2007 by Anonymous*

**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?
*December 1, 2010 by Elaina*

**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?
*January 8, 2012 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?
*January 8, 2012 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?
*January 8, 2012 by jumana*

**physics **

You throw a ball vertically from an apartment balcony to the ground 14.2 m below. Find the ball's initial velocity if it hits the ground 1.08 s after you release it.
*September 30, 2013 by squad*

**physics**

A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by 1 = 50° from its original direction, and the struck ball moves off at 2 = 29° from the original direction (Fig. 9-37). What are...
*March 9, 2011 by martin*

**physics**

problem says that a cannon ball is fired at a 30 degree angle off a 10 meter high wall at 80 m/s. Use work and energy to find it's impact speed. I worked out this out with the equation: (1/2)(mass)(initial velocity)^2 + mgy = (1/2)(mass) (final velocity)^2 + mg(y final) i got ...
*November 9, 2010 by Taylor*

**Physics - stuck**

Car A has an initial speed of 15m/s and is gaining speed at 1.5m/s^2. Car B has an initial speed of 20m/s and is gaining speed at 2.0m/s^2. The initial distance between them is 168m. Find when and where the cars will pass one another and their speeds as they are passing. ...
*February 18, 2008 by Anonymous*

**Math**

A football is kicked with an initial velocity of 42 ft/sec at an angle of 35 degrees with the horizontal. How far has the football traveled horizontally after 0.5 sec? round to nearest tenth. Could someone explain this please?
*October 6, 2008 by House*

**physics**

8. A pitcher throws a baseball off a 20m high cliff into a canyon at 30degrees above the horizon at an initial velocity of 35m/s. How far will the ball travel horizontally from the pitcher? Assume no air resistance. 9. How high will the ball get from the bottom of a canyon? 10...
*October 19, 2011 by teresa*

**Physics**

A ball of mass oscillates on a spring with spring constant = 200 . The ball's position is described by (0.350 ) 16.0 with measured in seconds. -What is the amplitude of the ball's motion? -What is the frequency of the ball's motion? -What is the value of the mass ? - Ronald ...
*April 28, 2010 by R*

**physics**

A ball is thrown straight up with an initial speed of 60 m/s. How high does it go? Assume the acceleration of gravity is 10 m/s 2 . Answer in units of m 010 (part 2 of 2) 10.0 points How long is it in the air? Answer in units of s
*October 22, 2012 by Anonymous*

**Physics**

You can use any coordinate system you like in order to solve a projectile motion problem. To demonstrate the truth of this statement, consider a ball thrown off the top of a building with a velocity v at an angle θ with respect to the horizontal. Let the building be 49.0 ...
*February 5, 2014 by Malorie*

**Physics**

A kickoff sends a football with an initial velocity of 25 m/s at an angle of 50 degrees above the horizontal. a) find the x and y components of the velocity b) find the time the ball is in the air c) find the horizontal distance the ball travels before hitting the ground d) ...
*November 29, 2012 by Annie*

**Physics Part 2**

Rick's next shot isn't as good. She hits the cue ball with a velocity of 5.6 m/s and it hits the 4 ball. The cue ball bounces off at a 45 degree angle off it's original path at a speed of 3.5 m/s. What is the velocity of the 4 ball? ---So all i know is the momentum before is...
*November 10, 2013 by CC*

**physics 101**

A 51.5-g Super Ball traveling at 29.0 m/s bounces off a brick wall and rebounds at 19.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.60 ms, what is the magnitude of the average acceleration of the ball during this time interval?
*September 7, 2011 by Anonymous*

**Calculus (Vector-Valued Functions)**

"a ball is thrown horizontally from the top of a cliff 256 ft high with an intial speed of 50 ft/sec. find the time of flight of the ball and the distance from thr base of the cliff to the point where the ball lands"
*January 27, 2012 by TheThinker*

**Physics**

A 50.0 g Super Ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 17.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.00 ms, what is the magnitude of the average acceleration of the ball during this time interval? (...
*January 24, 2013 by Robert *

**physics**

A 52.5g super ball traveling at 28.0m/s bounces off a brick wall and rebounds at 18.5m/s. A high speed camera records this event. If the ball is in contact with the wall for 4.10ms, what is the magnitude of the average acceleration of the ball during this time interval?
*February 4, 2013 by george*

**PHYSICS**

Max is throwing a 57g tennis ball upward and hitting it (with a racket) when it reaches the top of its flight. If the racket exerts an average force of 440N on the ball, find the speed of the ball after the collision (if they are in contact for 4.5ms)
*April 5, 2013 by R*

**PHYSICS**

A tennis ball is thrown horizontally from an elevation of 20.60 m above the ground with a speed of 21.0 m/s vertical m from ground??? f the ball is still in the air, how long before it hits the ground? (If the ball is not in the air, enter 0.)???? If the ball is still in the ...
*January 31, 2012 by Anonymous*

**algebra**

A ball has been hit with an initial velocity of 24.5 m/sec from a height of 5.375 meters off the ground. Write an equation that models the height of the ball.
*January 5, 2011 by Holly*

**Physics**

A tennis ball is thrown vertically upward with an initial velocity of +7.0 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s^2. Answer in units of m/s
*September 21, 2011 by Vanessa*

**physics**

A golf ball is drive. With an initial velocity of 25 m/s at an angle of 35 degrees with the horizontal find the maximum height the ball reaches above its original height
*November 9, 2011 by Anthony*

**physics**

A 0.23 kg ball of dough is thrown straight up into the air with an initial velocity of 12 m/s.Find the momentum of the ball of dough halfway to its maximum height on the way up.
*March 15, 2012 by Chris*

**Physics - Projectile Motion**

During baseball practice, you go up into the bleachers to retrieve a ball. You throw the ball back into the playing field at an angle of 42deg above the horizontal, giving it an initial velocity of 15m/s. If the ball is 5.3m above the level of the playing field when you throw ...
*August 19, 2010 by Shaila*

**Physics**

A boy is standing on a skateboard holding two 5.0 kg bowling balls. Initially they are moving to the left at a speed of 3.0 m/s. At one point the boy throws one ball to the right at 4.0 m/s causing his speed to increase. Before he can slow down, he throws the second ball to ...
*November 29, 2012 by Jordan*

**Physics, please help**

Hello, I don't know how about to answering this question: work out the problem of a ball of mass m that falls a distance h from rest. It hits the floor and rebounds to its starting height. (a) What total time ie required for the motion? (Neglect the time of contact with the ...
*October 31, 2006 by amber*

**History - Italy**

What is the history of the Italian sports of soccer and football. Is Italian football the same as American soccer? If so, what is Italian soccer? Thanks for your help.
*March 18, 2012 by Jade*

**Physics**

A player is shooting the basketball 10 meters from the hoop. He releases the ball when it is 2 meters above the floor, with an initial velocity of 12 m/s at an angle of 65 degrees. ( the basketball hoop is also 3m above the ground) How long does it take for the ball to reach ...
*October 18, 2009 by Jill*

**Algebra**

A ball is thrown upward with an initial velocity of 14 meters per second from a cliff that is high. The height of the ball is given by the quadratic equation where h is in meters and t is the time in seconds since the ball was thrown. Find the time that the ball will be 30 ...
*March 4, 2013 by Sherry*

**Physics**

A child's toy consists of a block that attaches to a table with a suction cup, a spring connected to that block, a ball, and a launching ramp. (Intro 1 figure) The spring has a spring constant k, the ball has a mass m, and the ramp rises a height y above the table, the surface...
*October 31, 2008 by Sam*

**math**

a baseball is hit with an initial velocity of 75 feet per second from the height of 3 feet. The function h(t)=-16t squared + 75t + 3 models the path of the baseball where t represents the time in seconds that the ball has been traveling and h represents the height of the ball ...
*March 14, 2012 by fee*

**PHYSICS**

A tennis ball is thrown horizontally from an elevation of 20.60 m above the ground with a speed of 21.0 m/s vertical m from ground??? f the ball is still in the air, how long before it hits the ground? (If the ball is not in the air, enter 0.)???? If the ball is still in the ...
*January 30, 2012 by Anonymous*

**college physics**

A cue ball initially moving at 4.3m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball’s final speed is 2.3 m/s at angle 1 with respect to it's original line of motion. The 8 ball moves with unknown speed at an angle 2 unknown with ...
*March 10, 2011 by sarah*

**Physics ~ CONSERVATION OF MOMENTUM ~**

1.) A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? 2.) A 3.0 kg ball at 3 m/s and strikes a 1.5 kg ball moving at -2 m/s. After the ...
*February 19, 2013 by Isis*

**physics**

Standing on top of the science building, which is 48 m high, a group of students use a slingshot to shoot a steel ball bearing straight up into the air. The ball bearing passes the students on its way down to the ground 3.2 sec after it was shot. (once the ball bearing leaves ...
*September 27, 2010 by karla*

**Ap physics**

A football is kicked at ground level with a speed of 10.0 m/s at an angle of 37.0° to the horizontal. How much later does it hit the ground?
*September 10, 2010 by rayray*

**Ap physics**

A football is kicked at ground level with a speed of 10.0 m/s at an angle of 37.0° to the horizontal. How much later does it hit the ground?
*September 10, 2010 by rayray*

**Physics **

A football is kicked at ground level with a speed of 20.7 m/s at an angle of 34.6° to the horizontal. How much later does it hit the ground?
*February 5, 2012 by Stella *

**Physics**

Will you check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) / (4m/s) =12 kg A 1-...
*October 14, 2007 by Soly*

**physics**

Will check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) / (4m/s) =12 kg A 1-kg ...
*October 15, 2007 by Soly*

**Physics**

Would someone please show me a way to work this out A ball is dropped from the top of a building 150 m high. (Ignore air resistance) A. How long does it take the ball to hit the ground? B. What is the speed of the ball when it hits the ground?
*September 13, 2011 by missy*

**Physics**

A ball of mass m(1) = 0.250 kg and initial v(1) = 5.00 m/s collides head-on with a ball of mass m(2) = 0.800 kg that is initially at rest. What are the velocities of the balls after the collision if they stick together?
*January 11, 2013 by Jackie*

**Physics**

A ball is thrown straight up, when it reaches the maximum height x, a second identical ball is thrown up with the same initial velocity as the first one. Where will these balls meet.
*September 11, 2013 by John*

**Physics**

A ball is thrown straight up, when it reaches the maximum height x, a second identical ball is thrown up with the same initial velocity as the first one. Where will these balls meet.
*September 11, 2013 by John*

**Physics(IMPORTANT)**

A small ball of mass m=0.60 kg hangs from a massless string of length l=0.9 m. The ball travels in a vertical circle and its speed at the bottom is v0=6.0 m/s (see figure). Neglect all friction and air drag, and use g=10m/s^2 for the gravitational acceleration. The ball is so ...
*November 1, 2013 by keitanako*

**Physics**

The Colliding Balls: A ball is released from rest at a height h above the ground. The ball collides with the ground and bounces up at 75% of the impact speed the ball had with the ground. The collision with the ground is nearly instantaneously. A second ball is released above ...
*November 20, 2012 by Zalak*

**Physics**

A stationary billiard ball, mass 0.17 kg, is struck by an identical ball moving at 2.7 m/s. After the collision, the second ball moves off at 60° to the left of its original direction. The stationary ball moves off at 30° to the right of the moving ball's original direction. ...
*January 20, 2010 by Erica*

**physical**

A basketball player who is 2.0m tall is standing on the floor 10.0m from the basket,If he shoots the ball at a 40.0¤ angle witi the horizontal,at what initial speed must he throw so that it goes through the hoop without striking the backboard?The basket height is 3.05 m.
*March 22, 2013 by yenebeb*

** Algebra**

Height difference. A red ball and a green ball are simultaneously tossed into the air. The red ball is given an initial velocity of 96 feet per second, and its height t seconds after it is tossed is -16t2 + 96t feet. The green ball is given an initial velocity of 80 feet per ...
*February 27, 2009 by Debbie*

**algebra**

Height difference. A red ball and a green ball are simultaneously tossed into the air. The red ball is given an initial velocity of 96 feet per second, and its height t seconds after it is tossed is 16t2 96t feet. The green ball is given an initial velocity of 80 feet per ...
*July 23, 2010 by joyce*

**Physics**

A. You can use any coordinate system you like in order to solve a projectile motion problem. To demonstrate the truth of this statement, consider a ball thrown off the top of a building with a velocity at an angle θ with respect to the horizontal. Let the building be 50.0...
*September 9, 2011 by Awonah*

**Physics**

If a ball is thrown directly upwards with twice the initial speed of another, how much higher will it be at its apex? A) 8 times D) 2 times B) 4 times E) 2 times C) 2 2 times Please show any equations that are used :)
*April 7, 2012 by DCM*

**physics**

Ball A is dropped from the top of a building of height h at the same instant that ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions, and the speed of A is twice the speed of B. At what height does the collision ...
*August 9, 2014 by Danielle*

**phusics**

A ball is thrown vertically upward from top of a building with speed of 20m/s. On the way back ball misses the building and lands on the ground. Total time the ball is in air is 6 seconds. Determine the height of the building.
*February 14, 2011 by mark matat*

**Physics**

Calculate the change in momentum in each of the following situations and state the direction of the change in momentum. a) A 4kg bowling ball strikes a stationary pin head-on at a speed of 3m/s. It continues to move in its original direction, but its speed is reduced to 2m/s. ...
*May 22, 2008 by Alex*

**Physics**

Calculate the change in momentum in each of the following situations and state the direction of the change in momentum. a) A 4kg bowling ball strikes a stationary pin head-on at a speed of 3m/s. It continues to move in its original direction, but its speed is reduced to 2m/s. ...
*May 22, 2008 by Alex*

**math **

If you have a graph 15 students like b-ball 10 like soccer and 5 like softball Write a ratio and solve the poblem
*November 7, 2010 by Jill*

**physics**

I have been stuck on this for a while now and cant figure out what it is i am doing wrong HELP!!! A tennis ball with a velocity of 15.5 m/s is thrown perpendicularly at a wall. After strik- ing the wall, the ball rebounds in the opposite direction with a speed of 9.3 m/s. If ...
*August 20, 2012 by Alex*

**Physics**

a ball is thrown up onto a roof, landing 4.70 s later at height h = 24.0 m above the release level. The ball's path just before landing is angled at = 62.0° with the roof. (a) Find the horizontal distance d it travels. (Hint: One way is to reverse the motion, as if it is on ...
*September 13, 2010 by Antonio*

**physics**

4. Brick A is hurled vertically upward from a bridge at an initial speed of 4.90 m/s. One second later, Brick B is thrown horizontally from the same bridge with an initial speed of 9.80 m/s. Which hits the water first?
*October 14, 2011 by Elijah*

**physics**

4. Brick A is hurled vertically upward from a bridge at an initial speed of 4.90 m/s. One second later, Brick B is thrown horizontally from the same bridge with an initial speed of 9.80 m/s. Which hits the water first?
*October 14, 2011 by Elijah*

**physics**

A student drops a ball from the top of a tall building; the ball takes 2.8 s to reach the ground. 1. what was the ball's speed just before hitting the ground? 2. What is the height of the building? help please?
*October 24, 2009 by Fefe*

**Physics**

Is conservation of mechanical energy likely to hold in this situation? A soccer ball is thrown into the air. (Disregard air resistance.) Explain your reasoning. What do you think?
*December 10, 2006 by Anonymous*

**Physics**

A 300 ball swings in a vertical circle at the end of a 1.2-m-long string. When the ball is at the bottom of the circle, the tension in the string is 13 . What is the speed of the ball at that point?
*October 6, 2009 by Dan*

**physics**

A 500 {\rm g} ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle, the tension in the string is 14 {\rm N}.What is the speed of the ball at that point?
*April 1, 2011 by Atlantis*

**Physics**

A football is kicked at ground level with a speed of 17.9m/s at an angle of 39.0∘ to the horizontal. How much later does it hit the ground?
*February 5, 2014 by Jack*

**English**

1. Korea lost at the soccer game by 1:2. 2. Korea lost in the scooer game by 1:2. (Which preposition do we have to use? Are both right?) Responses English - Ms. Sue, Sunday, June 7, 2009 at 9:46pm We usually don't use any preposition. We say: Korea lost the soccer game by 1 to...
*June 7, 2009 by John*

**physics**

a 8 kg ball is thrown upward with an initial speed of 20 m/s. suppose there is a constant air resistance of 30N opposing the motion during it entire up and down path. what is the acceleration on the way up and on the way down?
*December 20, 2010 by sacrifice*

**physics**

A volleyball is deflected vertically by a player in a game housed in a high school gymnasium where the ceiling clearance is 18m. If the initial velocity of the ball is 21.5 m/s, will the ball contact the ceiling?
*September 19, 2010 by stephanie*

**physics**

tiger woods hits tees off with an initial velocity of 80m/s at an angle of 23 degrees what will be the max height of his golf ball?how far will the golf ball travel
*December 12, 2011 by vanessa*

**physics**

a ball bounces directly upon another ball at rest and it self brought to rest by the impact.if half of initial kinetic energy is destroyed in the collision ,the co-efficient of restitution is?
*April 11, 2012 by srikala*

**Physics**

1. Will the swinging wonder ever let 2 ball bearings go in and one ball bearing out with twice the v? Why? 2. A 10.0 kg object moving to the right with a speed of 4.0 m/s collides and sticks to a 4.0 kg object moving to the left with a speed of 4.0 m/s. How much energy is lost...
*May 9, 2012 by Anonymous*

**Physics**

1. Will the swinging wonder ever let 2 ball bearings go in and one ball bearing out with twice the v? Why? 2. A 10.0 kg object moving to the right with a speed of 4.0 m/s collides and sticks to a 4.0 kg object moving to the left with a speed of 4.0 m/s. How much energy is lost...
*May 10, 2012 by Anonymous*

**physics**

from the top of a tower P,a ball is thrown vertically upwards.when the ball reaches a distance h below P,its speed is double of what it was at height h above P.show that the greatest height attained by the ball above P is 5h/3.
*August 25, 2011 by armando*

**physics**

A ball of radius 0.2m rolls along a horizontal table top with a constant linear speed of 3.04 m/s. The ball rolls off the edge and falls a vertical distance of 2.02m before hitting the floor. What is the angular displacement of the ball while it is in the air.
*October 26, 2011 by Sami*

**Science**

During a football match, the ball shot towards the goal struck the defender's foot at the speed of 10m/s and it bounced back at 20m/s. If the time of impact was 0.2 sec, and mass of the ball 0.5 kg,then find the average force exerted by defender on the ball.
*February 10, 2012 by Kushagra*

**Physics**

we have a test coming up and I cannot figure out the practice question. Can somebody please help? Aaron throws a 7.5 kg bowling ball by applying a 45 N force for a time of 0.90seconds. What is the impulse Aaron applies to the ball? What is the ball's speed at the end of this ...
*June 21, 2013 by Amalia*

**Physics**

Nicole throws a ball straight up. Chad watches the ball from a window 5.0m above the point where Nicole released it. The ball passes Chad on the way up, and it has a speed of 10m/s as it passes him on the way back down. How fast did Nicole throw the ball?
*September 17, 2013 by Kasey*

**physics**

A baseball is seen to pass upward by a window 27 m above the street with a vertical speed of 12 m/s. The ball was thrown from the street. (a) What was its initial speed? (b) What altitude does it reach? (c) How long after it was thrown did it pass the window? (d) After how ...
*September 4, 2007 by peter*

**science **

the neurons that transmit the signal to your foot to kick a soccer ball are called A. reflexes B. motor neurons C. sensory neurons D. interneurons
*May 23, 2014 by I NEED HELP FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*

**physics**

A 0.060-kg handball is thrown straight toward a wall with a speed of 9 m/s. It rebounds straight backward at a speed of 6.7 m/s (a) What impulse is exerted on the wall? magnitude 0.942 kg·m/s (b) If the ball is in contact with the wall for 3.0 ms, what average force is exerted...
*November 7, 2011 by Amanda*

**physics**

if a cannon on top of a trolley was moving at a constant speed, then fired a ball VERTICALLY and the trolley continued at the same speed. Would the ball land infront behind or on top the trolley
*May 23, 2011 by lisa*

**Physics**

A ball is thrown straight up from the ground with speed . At the same instant, a second ball is dropped from rest from a height , directly above the point where the first ball was thrown upward. There is no air resistance. Question- Find the value of in terms of and so that at...
*May 28, 2010 by Anonymous*

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