A regulation soccer ball of mass is initially moving in a straight line at
PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A regulation soccer ball of mass 0.45kg is initially moving in a straight line at 8.0m⋅s−1. A player kicks the ball, increasing its speed to 20.0m⋅s−1 along the same line.
(a) Calculate the ball’s translational kinetic energy before and after the kick. Show all work and include units.
(b) Determine the percent increase in kinetic energy produced by the kick.
(c) A second ball has mass 0.35kg and is kicked to the same final speed of 20.0m⋅s−1. Compare the kinetic energy of the lighter ball to that of the original ball at this speed and state which is larger and by what factor.