- #1
FistLength
- 5
- 0
Homework Statement
Lifting an object from point A to point B with a tension T in the string at constant velocity. What is the work done on the object?
Homework Equations
Work=Force x distance
The Attempt at a Solution
Net force = T - mg
Net F = 0 because acceleration = 0
T = mg
W = F * D
But net force is 0 because it is at constant velocity. I understand that the tension T does work =mgH
and gravity does work = -mgh
so net W= 0
but it gains potential energy...even though no work was done on it? How is this possible?
Here is the idea
http://www.batesville.k12.in.us/physics/phynet/mechanics/energy/lifting_a_book.htm