Q. A 78 kg circus performer jumps from a 4.2 m height onto a trampoline and stretches it downward 0.30 m. Assume that the trampoline obeys Hooke's law.
(a) How far will it stretch if the performer jumps from a height of 8.3 m?
(b) How far will the trampoline stretch if the performer stands still on it while taking a bow?
Q. Identify the action-reaction pairs when a baseball is being hit.
(a) ball hits a bat, bat hits the player
(b) ball hits bat, bat pushes the arm of the player
(c) bat hits ball, ball hits bat
(d) bat hits ball, ball hits the player
(e) none of these