A small ball falls freely from a height, the kinetic energy of the ball in the process of falling______
A. proportional to the distance it fell
B. proportional to the square of its falling distance
C. proportional to the square of the time it moves
D. Both A and C
Answer:D
A small ball falls freely from a height, the kinetic energy of the ball in the process of falling______
A. proportional to the distance it fell B. proportional to the square of its falling distance C. proportional to the square of the time it moves D. Both A and C