Vr т M after before

A steel ball of mass 0.710 kg is fastened to a cord that is 89.0 cm long and fixed at the far end. The ball is then released when the cord is horizontal, as shown in the figure. At the bottom of its path, the ball strikes a 2.00 kg steel block initially at rest on a frictionless surface. The collision is elastic. Find (a) the speed of the ball and (b) the speed of the block, both just after the collision. (a) Number i Unit (b) Number i Unit

A 17.8 kg sled is sitting at rest on level ice, and this sled is hit by another sled that is twice as massive. After the collision, the sleds stick together and move off at 6.3 m/s. How fast was the larger sled initially moving just before the collision?

A ballistic pendulum has a mass of 1.00 kg, it hangs from a string at rest when a bullet, mass 100.0 g is fired into it. The bullets speed is 50 m/s when it hits a pendulum. The two rise together immediately following the perfectly inelastic collision. Use the conservation of momentum and energy to determine how high they rise after the Impact.