Friday

December 9, 2016
Number of results: 68,923

**physics**

At the airport, you pull a 18 kg suitcase across the floor with a strap that is at an angle of 41° above the horizontal. Find the normal force and the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of kinetic friction between ...

*October 18, 2011 by Jessica*

**Physics for engineers**

A bowling ball weighing 71.3 is attached to the ceiling by a rope of length 3.73 . The ball is pulled to one side and released; it then swings back and forth as a pendulum. As the rope swings through the vertical, the speed of the bowling ball is 4.60 . What is the ...

*March 13, 2013 by Matabase*

**physics**

A golf ball of mass 4.50 10-2 kg is struck by a club. Contact lasts 2.35 10-4 s, and the ball leaves the tee with a horizontal velocity of 59.0 m/s. Compute the average force the club exerts on the ball by finding its average acceleration. what is the magnitude?

*February 3, 2011 by Anonymous*

**AP PHYSICS**

A golf ball is hit with an initial velocity of 50m/s at an angle of 25° above the horizontal. A) How far does the ball travel? B) How high does the ball go? x-component: V= (50)cos25° = 45.32 m/s y-component: V= (50)sin25° = 21.13 m/s COULD YOU PLEASE HELP ME WITH THESE 2 ...

*September 17, 2012 by Booker Perry*

**physics**

. A tennis player serves the ball at a height of h with an initial velocity of 40m/s at an angle of 4 0 with the horizontal. Knowing that the ball clears the 0.941m net by 152mm. Determine (a) the height h (b) the distance d from the net to where the ball will land.

*April 16, 2015 by Anonymous*

**physics**

a ball is thrown verrically upward. the speed of ball was 30m/s when it had reached ½ of its maximum height. 1) how high did the ball rise 2) find the velocity and acceleration 1 second after it is thrown

*September 13, 2016 by ayush*

**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.

*November 19, 2008 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.

*October 1, 2011 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?

*January 17, 2012 by yasmine*

**physics**

A student holds one end of a string in a fixed position. A ball of mass .2 kg attached to the other end of the string moves in a horizontal circle of radius .5m with a constant speed of 5m/s. How much work is done on the ball by the string during each revolution? a)0 J b).5 J ...

*December 28, 2006 by me*

**physics**

A diver runs horizontally with a speed of 0.759 m/s off a platform that is 10.0 m above the water. What is his speed just before striking the water?

*February 10, 2011 by tish*

**physics**

A diver runs horizontally with a speed of 0.759 m/s off a platform that is 10.0 m above the water. What is his speed just before striking the water

*February 23, 2011 by tish*

**physics**

A 45g golf ball is hit with a golf club. the head of the club has a mass of 0.19kg and travels 63m/s before the collision. the ball has a speed of 72m/s as it leaves the face of the club. what is the speed of the club after the collision?

*April 13, 2013 by y*

**Physics**

Estimate the force a person must exert on a string attached to a 0.160 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.80 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of ...

*October 31, 2010 by Joe*

**physics**

When a man throws a ball vertically up his watch fall down from his hand.if the initial speep of the ball is 20m/s from a building.what will be its velocity when it reaches the ground if the height difference b/n them is 100m?

*April 2, 2012 by minas*

**fizik**

A 2kg ball,A moves to the right with velocity 4 m/s collides with another 1kg ball,B moving in the opposite way with velocity 0.5m/s. after the collision, both ball move at 30 degree and 15 degree from horizontal. calculate the final velocity of each ball after the collision. ...

*April 6, 2011 by alya*

**calc**

A light is at the top of a pole 80ft high. A ball is dropped at the same height from a point 20ft from the light. If the ball falls according to 2=16t^2, how fast is the shadow of the ball moving along the ground 1 second later? please help!!! Let x be the distance of the ...

*November 9, 2006 by keneth*

**calculus**

A light is attached to the wall of a building 64 feet above the ground. A ball is dropped from the same height, but 20 feet away from the side of the building. The height y of the ball at time t is given by y(t) = 64 − 16t 2 . How fast is the shadow of the ball moving ...

*February 27, 2012 by anonymous*

**physics**

The initial speed of a cannonball is 500 m/s. The acceleration of gravity is 9.8 m/s2. The cannon and target are at the same elevation. If the ball is to strike a target that is at a horizontal distance of 3.7 km from the cannon, what is the minimum time of flight for the ball...

*September 12, 2011 by Anonymous*

**algebra**

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t–16t² Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?

*May 7, 2012 by Coach*

**algebra**

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t–16t² Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?

*May 7, 2012 by Coach*

**math HELP**

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t–16t² Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?

*May 8, 2012 by Coach*

**math**

Marnie practiced her basketball dribbling. After two tries she had bounced the ball 88 times. On the second try she had 2 fewer bounces than 8 times the number of bounces she had on the first try.How many bounces did she have on the second Try

*April 22, 2014 by shekinah*

**P.s.176**

Marine practiced her basketball dribbling. After two weeks she had bounced the ball 88 times.on the second try she had 2 fewer bounces than eight times the number of bounces she had on the first try. How many bounces did she have on the second try?

*November 22, 2015 by Shaunte*

**AP physics**

A 0.278-kg volleyball approaches a player horizontally with a speed of 16.2 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.4 m/s. (a) What impulse is delivered to the ball by the player? (Take the ...

*February 22, 2015 by alba*

**Phy**

A 2.0 kg ball is placed against a spring of force constant 750N/m, which has been compressed 0.28m. The spring is released and the ball moves along a horizontal frictionless surface and up a ramp. Calculate the... a) maximum elastic potential energy of the spring (could it be ...

*January 14, 2013 by Shanelle*

**physics**

A football, if it was kicked when initially at rest, is inflated such that it will move in the direction of the kick with h=0.8 of the kicking foot's velocity We now consider the same ball being kicked while it's moving towards the football player's foot. Before the kick the ...

*July 5, 2013 by anonim*

**Physics**

A 0.150kg baseball is thrown upwards with an initial speed of 20.0 m/s. What is the force on the ball when it reaches half its maximum height? (Disregard air resistance.) What is the force on the ball when it reaches its peak? The force on the ball is gravitational weight, ...

*April 9, 2007 by Danielle*

**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*

**physics**

A ball is dropped into a well. A splash is heard 43 seconds later. The speed of sound (the speed at which sound travels through the air) is 345 m/s. HOW DEEP WAS THE WELL? I don't even know which equation to plug this into. At first I just tried s=d/t-> 345=d/43, but that ...

*August 30, 2014 by Debby*

**AP Physics **

A baseball player throwing the ball from the outfield usually allows it to take one bounce on the theory that the ball arrives sooner this way. Suppose that ball hits the ground at an angle θ and then bonuses but loses half of its speed. A. Assuming that the ball is ...

*September 22, 2015 by Rachel *

**physics**

A place-kicker kicks a football at an angle of è = 41.5° above the horizontal axis, as the figure below shows. The initial speed of the ball is v0 = 26 m/s. Also assume that the ball is kicked on the moon instead of on the earth. The acceleration due to gravity on the moon ...

*January 25, 2012 by Anonymous*

**physics**

You push a large 32 kg crate across the floor with a force F=330 N at an angle of 21 degrees below the horizontal. If the coefficient of kinetic friction between the crate and the floor is 0.45, what is the acceleration of the crate?

*September 21, 2010 by Ka *

**physics**

ball of mass m = 1.70 kg is released from rest at a height h = 54.0 cm above a light vertical spring of force constant k. The ball strikes the top of the spring and compresses it a distance d = 8.80 cm Neglecting any energy losses during the collision, find the following. a) ...

*March 3, 2016 by sherry*

**physics**

A volleyball is spiked so that it has an initial velocity of 18 m/s directed downward at an angle of 50¡ã below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*October 24, 2010 by hy*

**anonumoys**

A volleyball is spiked so that it has an initial velocity of 14 m/s directed downward at an angle of 61° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*February 18, 2011 by Anonymous*

**Physics**

A volleyball is spiked so that it has an initial velocity of 14 m/s directed downward at an angle of 58° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*September 18, 2012 by Donald*

**physics**

A volleyball is spiked so that it has an initial velocity of 12.0 m/s directed downward at an angle of 53.2 ° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*June 23, 2013 by louis aaaa*

**physics**

A volleyball is spiked so that it has an initial velocity of 12.0 m/s directed downward at an angle of 53.2 ° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*June 23, 2013 by louis aaaa*

**Physics**

A volleyball is spiked so that it has an initial velocity of 16.6 m/s directed downward at an angle of 55.2 ° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*September 7, 2013 by WR*

**physics**

A volleyball is spiked so that it has an initial velocity of 18 m/s directed downward at an angle of 53° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*September 9, 2013 by Anonymous*

**Physics**

A volleyball is spiked so that it has an initial velocity of 15.6 m/s directed downward at an angle of 56.9 ° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*February 21, 2014 by Elle*

**physics**

A volleyball is spiked so that it has an initial velocity of 19.9 m/s directed downward at an angle of 55.8 ° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*October 5, 2015 by Hannah*

**physics**

Part A. With what minimum speed must you toss a 190 g ball straight up to hit the 12 m-high roof of the gymnasium if you release the ball 1.5 m above the ground? Solve this problem using energy. Part B. with what speed does the ball hit the ground?

*November 13, 2010 by gavin*

**college physics**

A diver runs horizontally with a speed of 0.759 m/s off a platform that is 10.0 m above the water. What is his speed just before striking the water?

*February 23, 2011 by jc*

**physics**

A ball (mass 12 kg) moving at 15 m/s in the +x-direction collides with a ball (mass 36 kg) moving at 5.0 m/s in the +y direction. After colliding, the 12-kg ball moves at 6.0 m/s at an angle of 30°above the +x direction. Afterward, what is the speed and direction of the 36-kg...

*July 1, 2015 by K*

**Physics**

Two blocks are released from the same height above the floor. Block A slides through a less inclined track to the floor, whereas block b slides on more inclined track to the floor. Assume no friction.Which block gets to the bottom(floor) of the incline first? Explain?

*November 18, 2007 by John*

**Physics**

A ball is thrown horizontally from the top of a building 21.6 m high. The ball strikes the ground at a point 123 m from the base of the building. Find the x component of its velocity just before it strikes the ground. Find the y component of its velocity just before it ...

*February 2, 2012 by Anonymous*

**Physics**

A ball is thrown horizontally from the top of a building 21.6 m high. The ball strikes the ground at a point 123 m from the base of the building. Find the x component of its velocity just before it strikes the ground. Find the y component of its velocity just before it strikes...

*February 4, 2012 by Madison*

**LBCC**

An apartment building has the following apartments: 2 bdrm 3 bdrm 4 bdrm 1st floor 7 3 4 2nd floor 9 0 11 3rd floor 8 4 7 If an apartment is selected at random, what is the probability that it is a 2 bedroom apartment on the 3rd floor?

*April 7, 2013 by Lynn*

**Physics**

Sally applies a horizontal force of 500 N with a rope to dtag a wooden crate across a floor with a constant speed. The rope tied to the crate is pulled at an angle of 67.5 degrees. a) How much force is exerted by the rope on the crate? b) What work is done by Sally if the ...

*November 14, 2007 by Elizabeth*

**CalcPhys**

In an electricity experiment, a 1.30g plastic ball is suspended on a 56.0cm long string and given an electric charge. A charged rod brought near the ball exerts a horizontal electrical force F⃗ elec on it, causing the ball to swing out to a 25.0∘ angle and remain ...

*October 1, 2014 by Dib*

**Physics**

In an electricity experiment, a 0.900g plastic ball is suspended on a 50.0cm long string and given an electric charge. A charged rod brought near the ball exerts a horizontal electrical force F⃗ elec on it, causing the ball to swing out to a 23.0∘ angle and remain ...

*December 15, 2014 by Dan*

**physics**

A plane flying horizontally above Earth’s surface at 184 meters per second drops a crate. The crate strikes the ground 30.0 seconds later. What is the magnitude of the horizontal component of the crate’s velocity just before it strikes the ground? [Neglect friction.] [1 ...

*November 4, 2011 by Jules*

**Physics**

A box of books weighing 328N moves with a constant velocity across the floor when it is paged with a force of 385N exerted downward at an angle of 25.3 below the horizontal. Find muK between the box and the floor

*November 6, 2012 by Andy*

**Science**

A factory worker pushes a 29.2kg crate a distance of 4.1m along a level floor at constant velocity by pushing downward at an angle of 28* below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.25.

*March 17, 2014 by Garrett*

**physics**

You throw a ball straight up in the air. The instant after leaving your hand the ball’s speed is 30 m/s. Ignoring the effects of air resistance, predict how fast the ball is traveling 2 seconds later? Where is it at this time?

*April 10, 2011 by john*

**physics**

just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...

*October 20, 2010 by jo*

**physics**

just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...

*October 20, 2010 by jo*

**physics**

just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...

*October 21, 2010 by jo*

**Physics**

A box of mass m and initial speed v0 slides distance d across a horizontal floor before coming to rest. Use work and energy to find an expression for the coefficient of kinetic friction.Express your answer in terms of the variables v0, d, and free fall acceleration g.

*November 8, 2014 by Dib*

**algebra**

In his physics class, Mario discovered the height, h, in feet of a bouncing basketball after b bounces is given by the formula: h = 12(2/3)b - what is the height of the ball after 3 bounces?

*May 30, 2016 by Anonymous*

**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 ...

*March 9, 2011 by martin*

**physics**

A plane, diving with constant speed at an angle of 51.5° with the vertical, releases a projectile at an altitude of 654 m. The projectile hits the ground 6.40 s after release. (a) What is the speed of the plane? (b) How far does the projectile travel horizontally during its ...

*September 2, 2012 by gg*

**Mechanics**

During a soccer game a ball (of mass 0.425 kg), which is initially at rest, is kicked by one of the players. The ball moves off at a speed of 26 m/s. Given that the impact lasted for 8.0 ms, what was the average force exerted on the ball? Show the solution and answer.

*September 19, 2013 by Aries*

**physics(help!!!!!!!!!!!)**

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 2, 2013 by Anonymous*

**Physics**

A volleyball is spiked so that it has an initial velocity of 16 m/s directed downward at an angle of 62° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball? ______________m/s

*September 12, 2011 by Dwight*

**Math**

A high rise apartment building has four elevators. Each elevator travels upward at an average rate of 18 feet per second. The elevator travels 12 feet from one floor to the next. Suppose you get on the elevator on the first floor and travel straight to the fiftieth floor ...

*December 17, 2013 by Kristen*

**Physics**

A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?

*January 23, 2011 by Megan*

**Physics**

A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?

*January 23, 2011 by Megan*

**math**

the height of a ball thrown vertically upward from a rooftop is modelled by h(t)=-5t^2 +20t+50. Determine the maximum height of the ball.

*October 14, 2014 by Robert*

**Physics**

a bowling ball is thrown down from the top of a building at 20 m/s. Find the distance the ball travels in A) 1 s B) 3 s should I make the 20 m/s negative? I'm assuming the ball is just being thrown stright down... I'm using the formula d=V(initial)*t+1/2a*t^2 I'm getting -24.9...

*February 3, 2009 by Bex*

**physics**

A ball of mass 1.2kg and a volume of 35cm cubed is dropped from a height of 2m. Determine the height to which this ball will bounce.

*September 5, 2010 by Joe*

**Math**

A bowling ball is dropped from a bridge, and it takes 7 seconds to hit the ground. How far did the bowling ball fall?

*January 20, 2013 by Justin*

**Physics**

A baseball with a mass of 150 g is thrown horizontally with a speed of 39.5 m/s (88 mi/h) at a bat. The ball is in contact with the bat for 1.15 ms and then travels straight back at a speed of 45.0 m/s (101 mi/h). Determine the average force exerted on the ball by the bat. ...

*March 2, 2014 by Elaine*

**Physics**

Ball A is thrown upward from the top of a building and takes 12 s to hit the ground. Ball B is thrown downward with the same speed as Ball A and takes 7 s to hit the ground. How long does it take for ball A to reach it peak?

*September 12, 2015 by Kendra*

**maths**

A boy throws a ball vertically upwards with a velocity of 10m/s.What is the velocity of the ball when it is half way up?

*November 28, 2016 by Anonymous*

**physics**

A ball is thrown upward from the top of a 27.0-m-tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 31.2 m from the building. What must be the average speed of the person if he is to catch the ball at the ...

*May 13, 2007 by micole*

**Physics**

A cricket ball is thrown at a speed of 30ms^-1 in a direction 30 degrees above the horizontal. Calculate: 1. The maximum height. 2. The time taken to return to the same level. 3. The distance from the thrower to where the ball returns to the same level.

*October 17, 2016 by Tom Lisby*

**Physics**

A ball on the end of a string is whirled around in a horizontal circle of radius 0.300m. The plane of the circle is 1.19m above the ground. The string breaks and the ball lands 1.91m (horizontally) away from the point on the ground directly beneath the ball's location when the...

*September 18, 2015 by Lash*

**physics**

A ball is dropped from top of a building.if the distance travelled by ball in the last third of total time is 10m,the height of building is

*July 12, 2011 by Nitin*

**physics**

once a 21 kg crate is in motion on a hoizontal floor, a horizontal force of 58 N keeps the crate moving with a constant velocity. the acceleration of gravity is 9.81 m/s^2. what is mu k , the coefficient of kinetic friction, between the crate and the floor?

*November 11, 2010 by autumn *

**physics**

A large box whose mass is 20 kg rests on a frinctionless floor. A mover pushes on the box with a force of 250 N at an angle of 35 degrees below the horizontal. What is the acceleration of the box across the floor?

*January 16, 2011 by Brian*

**physics**

You pull a 18 kg sled across the floor with a strap that is at an angle of 40° above the horizontal with a force 86 N. Find the magnitude of the acceleration of the sled, given that the coefficient of kinetic friction between the sled and the floor is 0.23.

*September 22, 2012 by christina*

**physics**

A full shopping cart requires a force of 88.0 Newtons to move across a horizontal floor at a constant velocity. If the cart has a mass of 32.1 kg, what is the coefficient of kinetic friction between the cart and the floor?

*December 15, 2014 by bruh*

**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...

*February 16, 2013 by Isis*

**Physics**

A small ball is attached to one end of a spring that has an unstrained length of 0.202 m. The spring is held by the other end, and the ball is whirled around in a horizontal circle at a speed of 3.18 m/s. The spring remains nearly parallel to the ground during the motion and ...

*November 29, 2012 by Elizabeth*

**Physics**

A small ball is attached to one end of a spring that has an unstrained length of 0.202 m. The spring is held by the other end, and the ball is whirled around in a horizontal circle at a speed of 3.18 m/s. The spring remains nearly parallel to the ground during the motion and ...

*November 30, 2012 by Elizabeth*

**Physics Honors**

A pool ball leaves a 0.60 meter high table with an initial velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground and the horizontal distance between the table's edge and the ball's landing location.

*October 23, 2011 by Allison*

**Physics**

A girl throw a ball with initial velocity V at an inclination of 45° .The ball strikes the smooth vertical wall at a horizontal distance d from the girl & after rebounding returns to her hand .What is the coefficient oof resitution between wall & the ball

*October 17, 2016 by Javaid *

**physics**

a 1.9kg ball of putty moving to the right has a head -on inelastic with 1.3 kg putty ball moving to the left , if the combined blob doens;t move just after the collision, what can you conclude about the relative speeds of the balls before they collide?

*September 22, 2012 by tere*

**grade 11 physics**

A championship golfer uses a nine iron to chip a shot right into the cup. If the golf ball is launched at a velocity of 20 m/s at an angle of 45° above the horizontal, how far away was the golfer from the hole when he hit the ball? What maximum height did the ball reach?

*April 10, 2012 by sayan*

**physics**

A tiny ball of mass 0.60g is suspended from a rigid support with a piece of thread in a horizontal field of intensity 700N/C.The ball is in equilbrum when the thread is inclined at an angle of 20^(0) to the vertical.What are the magnitude and sign of the charge on the ball?...

*August 28, 2013 by bless*

**Physics**

You toss a ball from your window 8m above the groun. When the ball leaves your hand, ut is moving at 10m/s at an angle of 20 degree below the horizontal. How far horizontally from your window will the ball hit the ground? Ignore air resistance. Plz answer it fast . It's my ...

*October 27, 2016 by Alisha*

**Physics**

Two balls are connected by a string that stretches over a massless, frictionless pulley. Ball 1 has a mass of 0.45 kg and is held 0.74 m above the ground. Ball 2 has a mass of 5.7 kg and is held 0.88 m above the ground. When the balls are released, ball 2 falls to the ground, ...

*December 21, 2008 by jason*

**physic**

Two balls are conneted by a string that stretches over a massless, frictionless pulley. Ball 1 has a mass of 0.81 kg and is held 0.5 m above the ground. Ball 2 has a mass of 6.3 kg and is held 0.28 m above the ground. When the balls are released, ball 2 falls to the ground, ...

*January 15, 2012 by Anonymous*

**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 ...

*February 1, 2009 by Kimberly*

**physics**

A ballplayer standing at homeplate hits a baseball that is caught by another player at the same height above the ground from which it was hit. The ball is hit with an initial velocity of 23.0 m/s at an angle of 58.0° above the horizontal. (a) How high will the ball rise? (b) ...

*February 14, 2010 by candace*

**Physics**

A pool ball initially traveling 5 m/s strikes a second pool ball of identical mass in a totally elastic collision. After the collision the first ball has veered off its original path and is now traveling at 3 m/s. Find the speed and angle of each pool ball after the collision...

*April 9, 2012 by Mary*

**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?

*October 21, 2009 by Hillary*