How high must you lift a 25-newton book for it to have the same increase in potential energy as a 20-newton book that was lifted 0.5 m

The increase in gravitational potential energy of the 20-newton book is 10 J (20 N • 0.5 m = 10 J). The 25-newton book must be lifted to a height of 0.4 m to have an increase in gravitational potential energy of 10 J (25 N • 0.4 m = 10 J).

the force on the thing and the distance the force moves the thing