Question

A crane does 15,000J of work lifting a 100 kg steel beam at a construction site.

How much potential energy did the beam gain?
If the beam falls, how much kinetic energy will it have just before it hits the ground?
How high was the beam lifted?

Answer 1

@IrishBoy123

Answer 2

PE = mgh, where m is the mass of the object, g is the gravity, and h is the height at which the object reached.

KE = 1/2mv^2, where m is the mass of the object and velocity is the speed of the object.

Answer 3

PE = W = mgh