A 5.00 crate is suspended from the end of a short vertical rope of negligible mass. An upward force is applied to the end of the rope, and the height of the crate above its initial position is given by +(0.61 )

What is the magnitude of the force when 3.60 ?

Alright, I have done about 20 physics problems that are due next week, and this is the last one. It is very heavy on calculus, which i am not good at. In fact, I don't even really know where to start on this one. Thanks for the help.