Thursday

April 17, 2014

April 17, 2014

Number of results: 4,187

**Physics**

if the speed of the block is 9.5 m/s at the bottom of the ramp, from what height was the block released? what is the length of the ramp?" and i know that the mass is 7 kg, initial veloctity=0, it is frictionless, and inclined at an angle of 62 degreesif the speed of the black ...
*Monday, October 3, 2011 at 10:53pm by Ian*

**Physics**

Ok, so this probem is kinda complicated, so ask me if you need clarification. This problem deals with Impulse and Momentum. There are two balls hanging vertically from a horizontal plane. Ball A is pulled back and is set up to strike ball B. Given for ball A - mass = 1.5 kg. ...
*Wednesday, November 29, 2006 at 12:02am by Jared*

**phy**

1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
*Monday, January 28, 2013 at 3:34am by christ*

**phy**

1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
*Monday, January 28, 2013 at 3:34am by nandeve*

**physics**

1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
*Wednesday, February 12, 2014 at 6:37am by nandeve*

**physics**

What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) g(R−h)R g(R−h)2R2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
*Friday, March 14, 2014 at 7:24am by A*

**phy**

(Q1)What is the orbital radius and speed of a synchronous satellite which orbits the earth once every 24h? Take G=0.0000000000667Nm2/kg2. Mass of the earth is 598000000kg (a)4200000m and 31000m/s (b)5600000m and 4300m/s (c)430000m and 5000m/s(d)3400000m and 6000m/s (Q2) A ball...
*Friday, July 5, 2013 at 2:25pm by ikye*

**physics**

an ball of mass initially at rest fragments into two masses each of 1 kg moving with speed 0.6c. find the mass of original body
*Wednesday, September 4, 2013 at 9:03am by gj*

**physics**

Lance threw a ball straight up into the air. The ball's gravitational potential energy at its peak height was 0.4 joules, and its speed when it hit the ground was 4 meters per second. What was the mass of the ball?
*Wednesday, March 2, 2011 at 4:03pm by Stephanie*

**phsic**

A small steel ball bearing with a mass of 10 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.19 m. Calculate the speed at which the ball leaves the spring.
*Monday, September 20, 2010 at 9:59pm by penny*

**physics**

If the ball is released from rest at a height of 0.64 m above the bottom of the track on the no-slip side, what is its angular speed when it is on the frictionless side of the track?Assume the ball is a solid sphere of radius 4.0 cm and mass 0.14 kg
*Sunday, November 21, 2010 at 6:02pm by Sarah*

**physics**

A solid ball of radius b and mass m is released from the top of an incline of the incline is at the height h above the ground. If the ball rolls without slipping, what willl be its linear speed when it reaches the botton of the incline?
*Friday, November 25, 2011 at 10:42am by pakilina*

**math**

A particle moves in a vertical plane under gravity and an air resistance whose magnitude per unit mass is k times the speed of the particle, where k is a positive constant. The coordinates of the particle at time t, with respect to a horizontal axis Ox and a vertically upward ...
*Monday, September 27, 2010 at 4:40am by myralove*

**ap phyiscs**

A bowler throws a bowling ball of radius R=11 cm down a lane. The ball slides on the lane, with initial speed v(of the center of mass)=7 m/s and initial angular speed =0. The coefficient of kinetic friction between the ball and the lane is .25. The kinectic frictional force fk...
*Sunday, February 10, 2008 at 8:57pm by kristen*

**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 ballâ€™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 ...
*Thursday, March 10, 2011 at 3:28pm by sarah*

**physics**

After several large firecrackers have been inserted into its holes, a bowling ball is projected into the air using a homemade launcher and explodes in midair. During the launch, the 5.33-kg ball is shot into the air with an initial speed of 11.3 m/s at a 42.9° angle; it ...
*Sunday, August 4, 2013 at 8:46am by Anonymous*

**Classical Mechanics Physics - Urgent help please**

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m= ...
*Saturday, December 7, 2013 at 5:46pm by Briggs*

**Physics**

A shot-putter throws the shot (mass = 7.3kg) with an initial speed of 15.0 m/s at a 33.0 degree angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.00m above the ground.
*Saturday, September 12, 2009 at 1:21pm by Jordan*

**physics**

A shot-putter throws the shot ( mass = 7.3 kg) with an initial speed of 15.0 m/s at a 33.0 degreCalculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 1.90 m above the ground.e angle to the horizontal.
*Wednesday, October 12, 2011 at 10:27pm by Emma*

**Physics**

A bowling ball is rolled up an incline. If the ball has a speed of 12 m/s at the base of the incline, to what height h on the incline will the center mass travel?
*Tuesday, October 18, 2011 at 8:16pm by Anon*

**physics**

A car P is moving with uniform speed of 5m/s towards a carriage of mass 9kg at rest kept on the rails at point B. the height of AC is 120m.cannon balls of 1kg are fired from the car with an initial velocity of 100m/s at an angle 30 degree with the horizontal.the first cannon ...
*Sunday, January 16, 2011 at 8:29am by sreeram*

**PHYSICS WORK PROBLEM due tonight!! please help!**

A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.93 m from the end of the track after falling a vertical distance h2 = 1.18 m from the end of the track. (a) At what ...
*Thursday, April 15, 2010 at 3:34pm by brittany*

**last physics problem!**

A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.93 m from the end of the track after falling a vertical distance h2 = 1.18 m from the end of the track. (a) At what ...
*Thursday, April 15, 2010 at 5:32pm by brittany*

**Physics**

A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.81 m from the end of the track after falling a vertical distance h2 = 1.03 m from the end of the track. (a) At what...
*Sunday, October 14, 2012 at 12:59pm by Angela*

**PHYSICS(URGENT)**

A particle has a mass of 5kg. It is held at a height of 3 metres above the ground. Find: a.Its potential energy b.Itâ€™s kinetic energy when is hits the ground c.The speed with which the particle hits the ground
*Thursday, March 22, 2012 at 7:13am by LK*

**physics**

Two billiard balls of equal mass move at right angles and meet at the origin of an xy coordinate system. Ball A is moving upward along the y axis at v_A = 2.0m/s , and ball B is moving to the right along the x axis with speed v_B = 5.0m/s . After the collision, assumed elastic...
*Wednesday, November 28, 2012 at 11:34pm by nammilee*

**physics**

A ball of mass 0.1 kg is dropped from a height of 2 m onto a hard surface. If rebounds to a height of 1.5 m and it is in contact with the surface for 0.05s. Calculate the: (a) speed with which it strikes the surface. (b) speed with which it leaves the surface. (c) change in ...
*Saturday, March 15, 2014 at 3:29am by waslat *

**Physics**

A 10-kg mass is projected straight up with a speed of 20.0 meter/second. 1. Find the initial kinetic energy of the mass 2. To what height does the mass rise?
*Tuesday, October 1, 2013 at 11:39am by Anonymous*

**Physics**

A bowling ball of mass M and radius R is thrown along a level surface so that initially ( t= 0) it slides with a linear speed but does not rotate, see the figure. As it slides, it begins to spin, and eventually rolls without slipping. How far has the ball moved down the lane ...
*Sunday, December 4, 2011 at 1:43am by Helen*

**Physics**

A bowling ball of mass M and radius R is thrown along a level surface so that initially ( t= 0) it slides with a linear speed but does not rotate, see the figure. As it slides, it begins to spin, and eventually rolls without slipping. How far has the ball moved down the lane ...
*Sunday, December 4, 2011 at 1:44am by Helen*

**physics**

A child on a beach kicks a beach ball, giving it an initial velocity of 4.0 m/s. It was sitting on the ground when given the kick. The ball lands on the beach 5m away and closer to the ocean, with a speed of 1.6m/s just before it hits. the final landing place is 1.2 m lower ...
*Monday, November 7, 2011 at 8:32pm by bec*

**physics**

a ball mass 800g is dropped from height of 5m and rebounds to a hight of 3.8m the air resistance is negligible. calculate a. the kinetic energy of the ball just before impact b. the initial rebound speed of the ball c. the energy transferred to the ground during impact
*Monday, December 13, 2010 at 11:44am by lewis*

**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...
*Friday, October 31, 2008 at 10:33pm by Sam*

**Physics**

A tennis ball of mass m = 0.065 kg and speed v = 25 m/s strikes a wall at a 45° angle and rebounds with the same speed at 45° (Fig. 7-29). What is the impulse given the wall? I started out with finding the momentum and doubling it to get the impulse on the wall but that isn't ...
*Wednesday, November 11, 2009 at 2:17pm 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 ...
*Wednesday, March 26, 2008 at 10:33am by icy*

**Physics**

A wagon is coasting at a speed, vA, along a straight and level road. When ten percent of the wagon's mass is thrown off the wagon, parallel to the ground and in the forward direction, the wagon is brought to a halt. If the direction in which this mass is thrown is exactly ...
*Saturday, March 1, 2014 at 3:50pm by Shauna*

**Physics**

A wagon is coasting at a speed vA along a straight and level road. When twenty-five percent of the wagon's mass is thrown off the wagon, parallel to the ground and in the forward direction, the wagon is brought to a halt. If the direction in which this mass is thrown is ...
*Monday, March 24, 2014 at 9:46pm by Anonymous*

**Physics - Equilibrium**

On a level billiards table a cue ball, initially at rest at point O on the table, is struck so that it leaves the cue stick with a center-of-mass speed v_0 and a "reverse" spin of angular speed w_0. A kinetic friction force acts on the ball as it initially skids across the ...
*Friday, April 18, 2008 at 3:44pm by Nik*

**physics**

Starting from rest, a crate of mass m is pushed up a frictionless slope of angle (theta) by a horizontal force of magnitude F. Use work and energy to find an expression for the crate's speed v when it is at height h above the bottom of the slope. Express your answer in terms ...
*Saturday, November 10, 2012 at 11:39pm by Ohimai*

**physics**

A ball of mass m is rotated at constant speed v in a vertical circle of radius r as shown below. Find the tension in the cord when the ball is at position A and position B. (Position a is in top of the wheel, position B is on the bottom of the wheel, 180 degrees apart.)
*Friday, November 25, 2011 at 10:37am by pakilina*

**Physics**

A cart is coasting at a speed v A along a straight and level road. When ten percent of the wagonâ€™s mass is thrown off the wagon, parallel to the ground, and in the forward direction, the wagon stops. However, if this same amount of mass is thrown out the back of the wagon, at ...
*Tuesday, August 7, 2012 at 7:06pm by Chad*

**Physics**

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m= ...
*Saturday, December 7, 2013 at 8:20am by Geoff*

**Physics**

A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to rebound at an angle θ'2 = 44° from the neutron's initial direction. The neutron's initial speed is 7.0 105 m/s. ...
*Sunday, March 7, 2010 at 10:04pm by Ben*

**Physics**

A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to rebound at an angle θ'2 = 44° from the neutron's initial direction. The neutron's initial speed is 7.0 105 m/s. ...
*Sunday, March 7, 2010 at 10:04pm by Ben*

**physics**

A ruler stands vertically against a wall. It is given a tiny impulse at such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that . The ruler has mass 250 g and length 30 cm. Use m/s for the ...
*Friday, December 6, 2013 at 10:35am by juanpro*

**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 ...
*Friday, November 1, 2013 at 4:01pm by keitanako*

**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 ...
*Saturday, November 2, 2013 at 4:55am by Anonymous*

**ss01**

A small ball of mass m=0.60 kg hangs from a massless string of length l= 0.8 m. The ball travels in a vertical circle and its speed at the bottom is v0= 5.0 m/s (see figure). Neglect all friction and air drag, and use g=10 m/s2 for the gravitational acceleration. The ball is ...
*Saturday, November 2, 2013 at 11:16pm by 8.01x*

**Physics HELP!!**

A small ball of mass m=0.60 kg hangs from a massless string of length l= 1.2 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=10 m/s2 for the gravitational acceleration. The ball is ...
*Monday, November 4, 2013 at 12:40pm by Chelsea*

**Physics HELP!!!!**

A small ball of mass m=0.60 kg hangs from a massless string of length l= 1.2 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=10 m/s2 for the gravitational acceleration. The ball is ...
*Monday, November 4, 2013 at 5:07pm by Michael*

**physics**

An object of mass 0.5 kg is thrown vertically upward at a speed of 30 m/s. What is the kinetic energy of the object at the highest point of its trajectory? Would this answer be zero since velocity at the highest point is zero?
*Tuesday, November 10, 2009 at 10:55pm by Ivana*

**mechanics**

The figure below shows a ball with mass m = 0.299 kg attached to the end of a thin rod with length L = 0.388 m and negligible mass. The other end of the rod is pivoted so that the ball can move in a vertical circle. The rod is held horizontally as shown and then given enough ...
*Friday, November 2, 2012 at 5:18am by ruben*

**Physics**

A bullet with a mass of 0.01kg is fired horizontally into a block of wood hanging on a string. The bullet sticks in the wood and causes it to swing upward to a height of 0.1m If the mass of the wood block is 2kg, what is the initial speed of the bullet?
*Monday, October 11, 2010 at 2:42pm by Amanda*

**physics**

A mass m is thrown horizontally at 5.00 m/s off a 20.0m high cliff. find its speed at impact a)using projectile analysis (20.4m/s) b) using energy analysis
*Thursday, November 26, 2009 at 10:23pm by sammeh*

**physics**

Billiard ball A of mass mA=0.400kg moving with speed vA=1.80m/s strikes ball B, initially at rest of mass mB=0.500kg. As a result of the collision, ball A is deflected off at an angle of 30.0 degrees with a speed of vA=1.10m/s. (a) Taking the x axis to be the original ...
*Thursday, April 14, 2011 at 9:32pm by shahzi*

**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 ...
*Wednesday, September 24, 2008 at 4:21am by Sandhya*

**phy**

A vertical spring (ignore its mass), whose spring stiffness constant is 1000 N/m, is attached to a table and is compressed down 0.130 m. (a) What upward speed can it give to a 0.200 kg ball when released? m/s (b) How high above its original position (spring compressed) will ...
*Sunday, September 26, 2010 at 10:30am by mas*

**Physics**

A vertical spring (ignore its mass), whose spring stiffness constant is 880 N/m, is attached to a table and is compressed down 0.160 m. (a) What upward speed can it give to a 0.300 kg ball when released? (b) How high above its original position (spring compressed) will the ...
*Sunday, November 14, 2010 at 9:37pm by Joe*

**Physics**

a. find the speed from the height he fell. b. force*time=mass(changeinVelocityatImpact)
*Friday, March 16, 2012 at 5:28pm by bobpursley*

**Physics**

Several volcanoes have been observed erupting on the surface of one of Jupiter's closest moons. Suppose that material ejected from one of these volcanoes reaches a height of 4.96 km after being projected straight upward with an initial speed of 132 m/s. Given that the radius ...
*Saturday, April 28, 2012 at 3:57pm by Jane *

**physics**

A frictionless pendulum is made with a bob of mass 19.7 kg. The bob is held at height = 0.934 meter above the bottom of its trajectory, and then pushed forward with an initial speed of 2.93 m/s. What amount of mechanical energy does the bob have when it reaches the bottom?
*Wednesday, May 2, 2012 at 3:39pm by Anonymous*

**physics**

you have mg downward, and a force at the ceiling pulling upward. Now, when going upward, there is a force = ma that accelerates the mass upward (if it is accelerating). Total tension = ma + mg if falling (accelerating downward, a is negative. If it is at constant speed, then a=0
*Wednesday, December 17, 2008 at 5:17pm by bobpursley*

**physics**

A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 70.0° at a speed of v1 = 2.50 m/s. It bounces off at an angle of θ2 = 63.0° and a speed of v2 = 2.10 m/s.
*Wednesday, April 2, 2014 at 5:50pm by Anonymous*

**calculus**

a bowling ball of mass 6.5 kg rolled with a velocity of 12m/s. The ball hits a 1.3kg bowling pin. Sending it off with a speed of 3.5m/s at an angle of 80 degrees with respect to the original direction of the bowling ball whats is the angle and direction of the bowling balls ...
*Tuesday, January 3, 2012 at 11:18pm by Anonymous*

**physics**

A white billiard ball with mass mw = 1.32 kg is moving directly to the right with a speed of v = 2.91 m/s and collides elastically with a black billiard ball with the same mass mb = 1.32 kg that is initially at rest. The two collide elastically and the white ball ends up ...
*Sunday, March 10, 2013 at 3:17pm by Anonymous*

**Physics**

A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45ş below the horizontal and is given an initial downward speed of 1.50 m/s. find: At the bottom of the arc, determine the centripetal acceleration of the ...
*Saturday, June 25, 2011 at 8:58pm by Luis*

**physics**

A mass is dropped from a height of 30m, and at the same time from ground level (and directly beneath the dropped mass), and another mass is thrown straight up with a speed of 15 m/s. a) How far apart are the two masses after 0.5 s? b) Will the massses ever meet or pass each ...
*Thursday, August 24, 2006 at 9:53pm by Henry*

**Physics**

A truck of mass 7520 kg is traveling along a level road at an initial speed of 32.9 m/s and then slows to a final speed of 17.9 m/s. Find the total work done on the truck.
*Sunday, February 19, 2012 at 1:29pm by Tarra*

**physics**

A model rocket is propelled upward by a cylinder of compressed water. The cylinder emits water at a rate of 0.050 kg/second with an exit speed of 80.0 m/s. Initially, the rocket has a mass of 0.15 kg, including the water cylinder. What is the rocket's initial upward ...
*Sunday, September 19, 2010 at 11:47pm by Angela*

**physics**

A model rocket is propelled upward by a cylinder of compressed water. The cylinder emits water at a rate of 0.050 kg/second with an exit speed of 80.0 m/s. Initially, the rocket has a mass of 0.15 kg, including the water cylinder. What is the rocket's initial upward ...
*Monday, September 20, 2010 at 9:56am by Angela*

**physics**

A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to move off at an angle =45. The neutron's initial speed is 3.8×105 .
*Monday, March 29, 2010 at 8:35pm by Anonymous*

**physics**

A landing craft of mass 12000 kg prepare itself for moon landing. when at a vertical distance 160m above the moons surface its downward velocity is 15 m/s. a retrorocket is fired to give the craft an upward thrust to slow its speed to zero as it meet the surface.calculate the ...
*Tuesday, September 4, 2012 at 8:08am by Emily*

**Physics**

After a completely inelastic collision two objects of the same mass and the same initial speed are found to move away together at 1/2 thier initial speed. Find the angle bewteen the initial velocitie of the objects? Can you please show me the step to solve this problem? I am ...
*Monday, March 5, 2007 at 5:59pm by Tammy*

**Physics**

A hoop of mass M = 3 kg and radius R = 0.5 m rolls without slipping down a hill, as shown in the figure. The lack of slipping means that when the center of mass of the hoop has speed v, the tangential speed of the hoop relative to the center of mass is also equal to vCM, since...
*Friday, November 18, 2011 at 9:37pm by Nho Neim*

**physics**

a ball of mass 0.1kg makes an elastic head on collision with a ball of unknown mass,initially at rest .if the 0.1kg ball rebounded at one third of its original speed, what is the mass of the other ball?
*Monday, September 12, 2011 at 8:05pm by gallium*

**Physics**

1) A particle travels between two parallel vertical walls separated by 16 m. It moves toward the opposing wall at a constant rate of 6.4 m/s. It hits the opposite wall at the same height. The acceleration of gravity is 9.8 m/s. a) What will be its speed when it hits the ...
*Thursday, June 16, 2011 at 10:05am by Lia*

**Physics - Momentum**

A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-third its original speed. What is the mass of the second ball?
*Thursday, December 10, 2009 at 6:04pm by DJ*

**Physics**

A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-fourth its original speed. What is the mass of the second ball?
*Thursday, December 10, 2009 at 6:22pm by Eric*

**Physics**

1. A ball is projected horizontally from the edge of a table that is 4.0 meters high, and strikes the floor at a point 3.0 meters from a point on the floor directly below the edge of the table. The initial velocity of the ball as it is projected from the table is, in m/s ( g=9...
*Sunday, March 30, 2008 at 3:48am by Sandhya*

**Physics .. help!!**

Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. If the engine provides an upward force (thrust) of 3270 N, the craft descends at constant speed; if the engine provides only 2190 N, the craft accelerates downward at 40 m/s2. What is the ...
*Tuesday, February 6, 2007 at 9:51pm by COFFEE*

**Physics**

Consider the conical pendulum, a mass on the end of a string, with the other end of the string fixed to the ceiling. Given the proper push, this pendulum can swing in a circle at an angle q of 25.5 with respect to the vertical, maintaining the same height throughout its motion...
*Tuesday, November 13, 2012 at 11:09am by Luke*

**Science**

An escalator is moving downward with a uniform speed of u. A man of mass m is running upward on it at a uniform speed of v. If the height of the escalator is h, the work done by the man in going up the escalator is?
*Thursday, December 8, 2011 at 2:42pm by Dawn*

**physics**

speed of ball= 2PI*radius/time a) force= mass*v^2/r b) what happens when v doubles?
*Saturday, October 23, 2010 at 4:55pm by bobpursley*

**Physical Science**

I have a really good grade in this class and I need to keep it that way. I am only asking to have my answers checked. I would like to graduate with honors so please help if you can. 1. A car traveling along the highway needs a certain amount of force exerted on it to stop. ...
*Sunday, January 2, 2011 at 7:11pm by Toni*

**Physical Science**

I have a really good grade in this class and I need to keep it that way. I am only asking to have my answers checked. I would like to graduate with honors so please help if you can. 1. A car traveling along the highway needs a certain amount of force exerted on it to stop. ...
*Sunday, January 2, 2011 at 10:03pm by Toni*

**Physics**

For an elastic collision, both momentum and kinetic energy are conserved. m1 = mass of colliding ball m2 = mass of ball initially at rest v1i = initial speed of colliding ball v1f = final speed of colliding ball v2i = initial speed of at rest ball = 0 v2f = final speed of at ...
*Friday, November 9, 2012 at 12:52pm by Jennifer*

**physics**

A billiard ball of mass 0.16 kg has a speed of 1.80 m/s and collides with the side of the billiard table at an angle of 34.6°. For this collision, the coefficient of restitution is 0.841. What is the angle relative to the side (in degrees) at which the ball moves away from the...
*Thursday, February 9, 2012 at 9:48pm by sara*

**Physics**

A uniform, spherical bowling ball of mass m and radius R is projected horizontally along the ﬂoor at an initial velocity v0 = 6.00 m/s. The ball is not rotating initially, so ω0 = 0. It picks up rotation due to (kinetic) friction as it initially slips along the &#...
*Wednesday, November 19, 2008 at 7:20pm by Samantha*

**Physics**

A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 5.40 m/s at the bottom of the rise, ...
*Monday, November 3, 2008 at 9:32am by Kyle*

**Physics**

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

**College Physics**

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 96.5 kg. The mass of the rock is 0.250 kg. Initially the wagon is rolling forward at a speed of 0.460 m/s. ...
*Thursday, October 14, 2010 at 1:28pm by Jordan*

**physics**

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 96.5 kg. The mass of the rock is 0.250 kg. Initially the wagon is rolling forward at a speed of 0.460 m/s. ...
*Friday, October 15, 2010 at 6:58pm by Sarah*

**Physics**

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 97.0 kg. The mass of the rock is 0.320 kg. Initially the wagon is rolling forward at a speed of 0.540 m/s. ...
*Sunday, October 14, 2012 at 4:27pm by Sara*

**Physics**

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 92.5 kg. The mass of the rock is 0.310 kg. Initially the wagon is rolling forward at a speed of 0.550 m/s. ...
*Monday, October 22, 2012 at 8:40pm by Elizabeth*

**Physics 141**

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 93.0 kg. The mass of the rock is 0.320 kg. Initially the wagon is rolling forward at a speed of 0.520 m/s. ...
*Tuesday, March 11, 2014 at 9:51pm by dakota22*

**PHYSICS (please help)**

A solid, uniform disk of radius 0.250 m and mass 51.1 kg rolls down a ramp of length 4.60 m that makes an angle of 18° with the horizontal. The disk starts from rest from the top of the ramp. a)Find the speed of the disk's center of mass when it reaches the bottom of the ramp...
*Wednesday, October 31, 2012 at 12:21pm by Sandy*

**physics**

A softball of mass 0.220 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 4.8 m/s. Calculate the mass of...
*Wednesday, December 9, 2009 at 6:21pm by Shane*

**1**

High-speed stroboscopic photographs show that the head of a golf club of mass 200 g is traveling at 55.0 m/s just before it strikes a 46.0-g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 40.0 m/s. Find the speed of the golf ...
*Saturday, November 13, 2010 at 6:17pm by moh*

**physics - please help**

A golf ball of mass 0.045 kg is hit off the tee at a speed of 48 m/s. The golf club was in contact with the ball for 5.4 10-3 s. (a) Find the magnitude of the impulse imparted to the golf ball. (b) Find the magnitude of the average force exerted on the ball by the golf club.
*Wednesday, December 9, 2009 at 6:15pm by Anonymous*

**physics**

A steel ball of mass 0.300 kg is fastened to a cord that is 70.0 cm long and fixed at the far end. The ball is then released when the cord is horizontal. At the bottom of its path, the ball strikes a 2.50 kg steel block initially at rest on a frictionless surface. The ...
*Monday, March 28, 2011 at 11:00am by Taylor*

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