When Jake tosses a ball while standing still on his skateboard, he and his skateboard recoil. If he goes through the motions of tossing the ball, but doesn’t toss it, his net recoil will ideally be

a. almost as much as if he threw the ball
b. zero
c. very small
d. the same as if he threw the ball

B

Explanation:

The application of conservation of momentum requires the ball to be tossed at a certain speed for the recoil to exist. Since he never tossed the ball, the ball did not gain any velocity nor did it detach from the initial system of person + skateboard + ball. Hence, the recoil is zero.

report

explanation:

temp rises, and expansion