Recent content by NewtonGalileo

This is what I tried. Imagine that the two U's were separated and were moving towards each other. Since their final momentum is 0 (they're touching each other in equilibrium as the problem states), their initial momentum ought to be 0 because the system is closed. So, since the tube on the...

Two streams of water flow through two U-shaped tubes (the two U-tubes are facing away from each other, but touching each other at the base of the 'U's). The tube on the left has cross-sectional area A, and the speed of the water flowing through it is v. The tube on the right has cross-sectional...

But, net force is a constant. It is not proportional to time t. I also looked at: power = work/time = force x velocity power ~ t force x velocity ~ t since force is a constant, velocity ~ t wouldn't this be right? why sq.root of t?

Homework Statement A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The speed of the particle is proportional to: sq root of (t) t t^2 1/sq root(t) 1/t Homework Equations power = work / time...

I thought 76 degrees also. But, the answer given in the answer key is 0 degrees. Does not make sense. Am I missing something?

Homework Statement A man wishes to pull a crate 15 m across a rough floor by exerting a force of 100 N. The coefficient of kinetic friction is 0.25. For the man to do the least work, the angle between the force and the horizontal should be: 0 14 43 66 76 Homework Equations...