The mass of the crate is 1150 kg and is lifted vertically by 60 m. The power output of the forklift is 960 kW. The weight of the crate causes a clockwise moment of 3800 Nm about the center of the front wheel of the forklift truck. The weight of the crate; b. the work done to lift the crate, and the gravitational potential energy (PE) of the crate.