A ball is dropped from a height of ____. If the coefficient of restitution for the collision between the ball and the floor is 0.5, after hitting the floor, the ball rebounds to a height of__________.
a. 0.5 m; 0.25 m
b. 1 m; 0.5 m
c. 2 m; 1 m
d. 5 m; 2.5 m
