A student attaches a rope to a 6.7 kg box of books. He pulls with a force of 32 N at an angle of 30° with the horizontal. The coefficient of kinetic friction between the box and the sidewalk is 0.32. Find the acceleration of the box.

What happens to the light rays when they hit the specimen?

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.