Question

A 45.4 kg of beer rolls down a 3.05 m long plank leading from the flatbed of a truck 0.880 m above the ground. Determine the amount of work (in Joules) done on the keg by gravity.
bobpursley
what is mg*height
Hau
Gravitational potential energy.
bobpursley
GPE of one, with respect to the other being at zero PE:

GPE= -Gm/r