Question

A person lifts a 3.8 kg cement block a vertical distance 0.9 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process.


? J (by person)
? J (by force of gravity)

Answer 1

work done on gravity= mass*g*heightlifted.

work done by gravity= -mgh

Answer 2

i don't understand