tension on the table top pulley

[ptrainerjoe]

heres the problem:

A person pulls a heavy load of mass 37kg up the side of a building by using a frictionless pulley. The load travels up a distance of 7.5m. Take the load to move with ocnstant velocity and ignore any acceleration at the beginning or end of the move. How much work is done by the tension in the rope?

I know the work done by the person and gravity(which are the other two parts of the question) but i'm getting stuck on this part. I'm thinking it would be zero but the rope is moving so i don't know

Thanks for the help.

[HallsofIvy]

Work equals force times distance. That's all you need.

Since there was no accleration, the force in the rope is exactly equal to the weight of the load.