Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle . He falls for 15 m before the bungee cord begins to stretch. Chris's mass is 75 kg and we assume the cord obeys Hooke's law, F=−kx , with k = 60 N/m .

Don (82.8 kg) is going bungee jumping. The bridge he will jump off of is 54.0 m above the ground. After Don jumps, he comes to a spot 10.3 m above the ground before the bungee pulls him back.How much elastic energy is in the bungee cord when Don is 10.3 meters above the ground? If 6,200 J of the elastic energy (use your number from above) is converted to internal energy, to what height will Don return when the bungee bounces him back up? If Don drops his phone (0.18 kg) when he is 28.4 m in the air, what speed will it reach before it hits the ground?

A bungee jumper has a mass of 67 kg.The total height of the jump towards Earth is 210 m.Calculate the speed of the bungee jumper at the bottom of the jump just before the bungee cord stretches and catches them.Gravitational field strength = 9.8 N/kgIgnore the effects of air resistance.Give your answer to three significant figures.

A bungee jumper dives from a bridge. At a point near the bottom of his dive, the forces acting on him are:gravity: 700 N downwardsspring force: 850 N upwardsair resistance: 60 N upwardsShowing your working, calculate:the net force (strength and direction) acting on himhis acceleration, given that his mass is 70 kg

If 6,200 J of the elastic energy (use your number from above) is converted to internal energy, to what height will Don return when the bungee bounces him back up?

A man fell from the top of a building of height 30 m with a initial velocity of 10 m/s . He his weight on the moon was 60Kg i) Calculate final Velocity ii)Calculate time taken. iv)Calculate his mass. v)Calculate his weight on earth.