[Fudpucker]

If a troll is 12 ft tall and has a guy drop a 52 kg club on his head from a height of 25 ft, how much energy will transfer to his head?

If the troll's head brings the club to a complete stop before it continues to the floor, how fast will the club be moving when it hits the floor?

Any help with the necessary equations is appreciated.

Thanks,

[ebaines]

1. The kinetic energy when it hits his head is equal to the loss of potential energy from falling 25-12 = 13 feet. The potential energy is found from PE = mgh.

2. To find the velocity of an object dropped from height h, use



Here v_1=0 since it starts from rest, and d = 12 ft.