15-85. A ball is thrown onto a rough floor at an angle of e = 45°. If it rebounds at the same angle o = 45°, determine the coefficient of kinetic friction between the floor and the ball. The coefficient of restitution is e = 0.6. Hint: Show that during impact, the average impulses in the x and y directions are related by I, = ul,. Since the time of impact %3D
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- I. A lump of clay (m = 3.01 kg) is thrown towards a wall at speed v = 3.15 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 3.15 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 2.24 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…A football player is preparing to punt the ball down the field. He drops the ball from rest and it falls vertically 1.0 m down ongo his foot. After he kicks it, the ball leaves the foot with a speed of 18 m/s at an angle of 51 degrees above the horizontal. 1) what is the magnitude of the impulse delivered to the ball in Kg meters per sec as he kicks it? An american football has a mass of 420 g 2) at what angle in degrees above the horizontal is the impulse delivered to the football?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 tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 50.4 m/s and returns the shot with the ball traveling horizontally at 31.4 m/s in the opposite direction. (Take the direction of the ball's final velocity (toward the net) to be the +x-direction.) (a) What is the impulse delivered to the ball by the racket? magnitude N-S direction Select-v (b) What work does the racket do on the ball? (Indicate the direction with the sign of your answer.)A 71.1-kg basketball player jumps vertically and leaves the floor with a velocity of 1.87 m/s upward. (a) What impulse does the player experience? magnitude N.S direction ---Select- (b) What force does the floor exert on the player before the jump? magnitude direction ---Select- (c) What is the total average force exerted by the floor on the player if the player is in contact with the floor for 0.450 s during the jump? magnitude direction ---Select--The force exerted by an electric charge at the origin on a charged particle at the point (x, y, z) with position Kr = (x, y, z) is F(F) = where K is constant. vector 7= 3' 171³ Assume K = 30. Find the work done as the particle moves along a straight line from (3,0,0) to (3,4,2).