A hoist lifts a box of tools onto a shelf.
The increase in gravitational potential energy of the box is 294 J.
The mass of the box of tools is 20 kg.
Calculate the vertical height the box is raised.
(gravitational field strength, g=9.8 N/kgg = 9.8\text{ N/kg}g=9.8 N/kg)
Use the equation:
change in gravitational potential energy=mass×gravitational field strength×change in vertical height \text{change in gravitational potential energy} = \text{mass} \times \text{gravitational field strength} \times \text{change in vertical height} change in gravitational potential energy=mass×gravitational field strength×change in vertical height