Thread: Lets do some physics...

Yes, B is being pulled down by gravity, which pulls A to the right. That is what I meant by block B falls.

W = |F| |S| Cos(Θ), They are in motion. I don't remember the masses of the blocks. But I got...

1: How much work does friction do on block A? -70 J
2: How much work does gravity do on block B? 70 J

*Edit* At no point do I need to find the total Work done on the object, only work by 1 force.
I solved the problem twice, once with conservation on energy, and once using sum of forces = ma. Got the same answers in both parts with both methods.

Does that make sense?

Are they accelerating?

If the net force is not equal to 0, then yes...

He is claiming the work done on both is equal, but in opposite direction. Since they both have to travel the same distance, the forces must thus be in equal, but opposite direction. Which would mean no net force. Again I ask, are they accelerating?

Originally Posted by ElFuriosoGato

He is claiming the work done on both is equal, but in opposite direction. Since they both have to travel the same distance, the forces must thus be in equal, but opposite direction. Which would mean no net force. Again I ask, are they accelerating?

doubt it, the atypical problem, just focuses on the system in motation moving at a constant velocity. Any acceleration would really through this problems focus OFF of work.