Recent content by brawler234

But I thought that force needs to be in the same direction as displacement, otherwise work isn't done.

It basically just asks us to calculate the power.

When calculating power, which is Work/time, do we consider NET work (work calculated based on net force) or just work done by the individual force that goes in the same direction as the displacement? If it's the first, then power is 3W. If it's the second, then power is 5W. Which one is correct?

Hmm... so there is work done by the box pusher as well as work done by the friction of the floor?

A box is moving at a constant velocity. 250N of applied force is acting on a box while 250N of friction is acting on it on the opposite direction. If the box travels 4 meters in the same direction as the applied force, how much work is done? I know that work = force * displacement. Is the...

I understand that work is done when (a) a force displaces an object, (b) energy is converted from one form to another, (c) heat is transferred between a system and its surroundings, yet I have trouble giving a precise definition for it. Everywhere I go, the definition of energy is "the ability...