Cartoon96

Force friction is 63 N. Since the velocity is constant, there is no acceleration, and no force trying to prevent the crate from moving. F is given as F = ma. F is the net force: Fa (force applied) - Ff (force friction). If there is no acceleration, 'a' be...

Conservation of Momentum says m1v1+m2v2 (before collision) = m1v1+m2v1 (after) In this problem you're given that the bullet and the gun are of one mass before the collision, and are sitting still, which cancels out the first half of the equation. This lea...

When you think about the conservation of momentum, there is always some force going in both directions. The mass and velocity of the water coming out of the fire-fighter's hose makes the tube want to move backwards, because there is a force pushing the ho...

Don't copy me!!!!!