A 4.0 kg rock moving at 14 m/s strikes a stationary 3.0 kg rock. Afterward, the 4.0 kg rock is moving at 2.1 m/s in its original direction of motion. Calculate the kinetic energy of the 3.0 kg rock after the collision.

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33

When does your body conduct current more readily?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.