Question

An initially stationary 15kg crate is pulled, via a cable, a distance d=5,7m up a frictionless ramp to a height h of 2,5m, where it stops. How much work Wg is done on the crate by the gravtational force Fg during the lift?

Answer 1

The work done by the gravity

$$W_g=mgh=15\:\rm kg\times 9.8\: N/kg\times 2.5\: m=368\: J$$