When kicking a football, the kicker rotates his leg about the hip joint. a) If the velocity of the tip of the kicker’s shoe is 34 m/s and the hip joint is 1 meters from the tip of the shoe, what is the shoe tip’s angular velocity in degrees/sec? b) The shoe is in contact with the initially stationary 470 gram football for 24 ms. What average force is exerted on the football to give it a velocity of 21 m/s when it begins traveling in air after leaving the foot? c) Find the maximum range (horizontal distance) in meters of the football, neglecting air resistance. It happens when the launch angle is 45 degrees above the horizon.
When kicking a football, the kicker rotates his leg about the hip joint. a) If the velocity of the tip of the kicker’s shoe is 34 m/s and the hip joint is 1 meters from the tip of the shoe, what is the shoe tip’s angular velocity in degrees/sec? b) The shoe is in contact with the initially stationary 470 gram football for 24 ms. What average force is exerted on the football to give it a velocity of 21 m/s when it begins traveling in air after leaving the foot? c) Find the maximum range (horizontal distance) in meters of the football, neglecting air resistance. It happens when the launch angle is 45 degrees above the horizon.
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter12: Rotation I: Kinematics And Dynamics
Section: Chapter Questions
Problem 60PQ
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When kicking a football, the kicker rotates his leg about the hip joint.
a) If the velocity of the tip of the kicker’s shoe is 34 m/s and the hip joint is 1 meters from the tip of the shoe, what is the shoe tip’s angular velocity in degrees/sec?
b) The shoe is in contact with the initially stationary 470 gram football for 24 ms. What average force is exerted on the football to give it a velocity of 21 m/s when it begins traveling in air after leaving the foot?
c) Find the maximum range (horizontal distance) in meters of the football, neglecting air resistance. It happens when the launch angle is 45 degrees above the horizon.
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