A tennis ball strikes a wall with an initial speed of 15 m/s. The ball bounces off the wall but rebounds with slightly less speed (14 m/s) after the collision. Explain (a) what else changed its momentum in response to the ball’s change in momentum so that overall momentum is conserved, and (b) how some of the ball’s kinetic energy was lost.
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A tennis ball strikes a wall with an initial speed of 15 m/s.
The ball bounces off the wall but rebounds with slightly less speed (14 m/s) after the collision. Explain (a) what else changed its momentum in response to the ball’s change in momentum so that overall momentum is conserved, and (b) how some of the ball’s kinetic energy was lost.
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- III. Same lump is thrown towards the same wall (m=3kg, v=3m/s), but this time it bounces off the wall at speed of 2.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision.2. A person claims that they are able to throw a 0.145-kg baseball with as much momentum as a 3.00-g bullet moving with a speed of 1.50 x 10³-m/s. (a) What speed must the baseball have for this to be true? (b) Calculate the kinetic energy of the baseball and the bullet at these speeds, stating which is greater. Answers: (a) 31.0 m/s (b) 69.7 J, 3.38 x 10³ JA 120 kg man is standing in the middle of a skating rink holding a 2kg ball. He suddenly throws the ball eastward at 5 m/s. What is the magnitude of his momentum afterward? Assuming frictonless between his skateboots and the ice.
- Let's assume a perfectly elastic collision between a golf club (mass of 250 gr) and a golf ball (mass of 46 gr). If the club hits the ball at a speed of 45 m/sec what will be the speed of the ball after the impact? What happens if the mass of the club is doubled?A man claims he can safely hold on to a 10.20 kg child in a head-on collision with a relative speed of 123. mi/h lasting for 0.140 s as long as he has his seat belt on. Hint: 1 mi/h = 0.447 m/s (a) Find the magnitude of the momentum of the child. A man claims he can safely hold on to a 10.20 kg child in a head-on collision with a relative speed of 123. mi/h lasting for 0.140 s as long as he has his seat belt on. (c) For comparison, calculate the magnitude of force generated by the record weightlifting champion in the 2004 Olympics. He lifted 263 kg. Based on these results, is the man’s claim valid? Explain why or why not.I. A lump of clay (m = 3.00 kg) is thrown towards a wall at speed v = 3.00 m/s. The lump sticks to the wall. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. II. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 3.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. III. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 2.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during…
- 1. A lump of clay (m = 3.00 kg) is thrown towards a wall at speed v = 3.00 m/s. The lump sticks to the wall. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wallI. (c) Calculate percent of initial kinetic energy lost during this collision. II. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 3.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. III. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 2.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost…A small truck of mass 600 kg moves with a velocity of 60 m / s. If an object of mass 1200 kg has the same momentum as the truck, then its velocity should be (Instructions: Please do not write the units in your answer. Write only the number.)(a) What is the momentum of a garbage truck that is 1.20×104kg and is moving at 10.0 m/s ? (b) At what speed would an 8.00-kg trash can have the same momentum as the truck?
- A 5 kg cart, cart A, moves with v=3m/s and collides with another 5 kg cart, cart B, head on at rest. Neglecting air resistance and friction, do the following: Find the final velocity of the carts if the collision is perfectly inelastic. Find the linear momentum of each car before and after the collision if it is a perfectly inelastic collision. Find the kinetic energy before and after the collision if is perfectly inelastic. If the collision were elastic, what would be their final velocities? What would be the kinetic energy of each before and after the collision?A man who could only find a 75-kg blue rock nearby decides to drive a metal beach umbrella pole down into the soft sand of Galveston beach by dropping it straight down from a resting height of 2.3 meters. If the blue rock does not rebound off the pole just after contact (that means bouncing back and possibly hitting him in the head) then calculate the impulse the rock places on the umbrella pole. Assume the metal beach umbrella has a total mass of 175-kg