A 60-kg soccer player jumps vertically upwards and headsthe 0.45-kg ball as it is descending vertically with a speed of25 m/s. (a) If the player was moving upward with a speed of4.0 m/s just before impact, what will be the speed of the ballimmediately after the collision if the ball rebounds verticallyupwards and the collision is elastic? (b) If the ball is in contactwith the player’s head for 20 ms, what is the average accelerationof the ball? (Note that the force of gravity may be ignoredduring the brief collision time.)
A 60-kg soccer player jumps vertically upwards and headsthe 0.45-kg ball as it is descending vertically with a speed of25 m/s. (a) If the player was moving upward with a speed of4.0 m/s just before impact, what will be the speed of the ballimmediately after the collision if the ball rebounds verticallyupwards and the collision is elastic? (b) If the ball is in contactwith the player’s head for 20 ms, what is the average accelerationof the ball? (Note that the force of gravity may be ignoredduring the brief collision time.)
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter6: Momentum, Impulse, And Collisions
Section: Chapter Questions
Problem 14P: A 65.0-kg basketball player jumps vertically and leaves the floor with a velocity of 1.80 m/s...
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Question
A 60-kg soccer player jumps vertically upwards and heads
the 0.45-kg ball as it is descending vertically with a speed of
25 m/s. (a) If the player was moving upward with a speed of
4.0 m/s just before impact, what will be the speed of the ball
immediately after the collision if the ball rebounds vertically
upwards and the collision is elastic? (b) If the ball is in contact
with the player’s head for 20 ms, what is the average acceleration
of the ball? (Note that the force of gravity may be ignored
during the brief collision time.)
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