Yes, this is the point that I've been wondering about. If a body is moving at a constant speed then there can be no net force acting upon it, and yet in this case it is gaining potential energy. Where is this energy coming from, given that the forces upwards and downwards are equal?
Thank you...
I'm trying to understand the concept of work. I understand that no work can be done by a force if there is no displacement, but I have got confused about whether a force has to cause the displacement.
The site physicsclassroom.com says this:
But a mentor on this site says this:
This...