A 3kg ball travelling at 2m/s collides with a stationary 1kg ball. After the collition the 3kg ball deflects at an angle 15 degrees below the original trajectory. Calculate the angle the stationary ball will travel against the original trajectory (of the 3kg ball).

A 1000 kg object is found heading towards the Earth. At the moment it is 4 Earth radii away from the surface of our planet the asteroid is moving at 100 m/s. If it collides with our planet, how fast will it be moving right before it hits the surface? How much kinetic energy is going to be released in this collision?

Kramer goes bowling and decides to employ the force of gravity to "pick up a spare." He rolls the 6.50 kg bowling ball very slowly so that it comes to rest a center-to-center distance of 0.245 m from the one remaining 2.00 kg bowling pin. Treat both the ball and the pin as point objects, and determine the magnitude of the force of gravity ?⃗ grav between them.

In a game of pool, the cue ball strikes another ball initially at rest. After the collision, the cue ball moves at 3.50 m/s along a line making an angle of 22.0 degrees with its original direction of motion and the second ball has a speed of 2.00 m/s. a) Find the angle between the direction of motion of the second ball and the original direction of motion of the cue ball. b)  Find the original speed of the cue ball. c) Is the kinetic energy conserved? Show your proof.