Question

Ben Geller carries a 300- N suitcase up three flights of stairs ( a height of 12.0m ) and then pushes it with a horizontal force of 60.0 N at a constant speed of 0.6 m/s for a horizontal distance of 25.0 meters , how much word does Ben do on his suitcase during this entire motion ?

Answer 1

The total work is

$$W=3Wh+Fd,\\ W=3·300·12+60·25=12300\text{ J}.$$