When a man, who weighs 650 N, stands on a particular trampoline, its springy surface shifts downward 0.1 m. If he bounces on it so that its surface shifts downward 0.28 m, how hard is it pushing up on him?

Answer 1

The trampoline force is proportional to displacement, and in the opposite direction from the displacement. That is sometimes called Hooke's Law.
The answer is 2.8 times his weight.
2.8 * 650 = ___ N

Answer 2

213

Answer 3

1219

Answer 4

N / m x 2nd m = answer