1. After dropping from a height of 2 m onto a concrete oor, a 30.0-g ball rebounds to a height of 1 m. a. Find the impulse acting on the ball as it dropped. 13. Find the impulse acting on the ball as it rebounds. 0. Find the impulse on the ball while it was in contact with the floor. 2. Candona strikes a 0.05-kg golf ball with a force of 100 N. If the ball moves with a velocity of 50 m/s, calculate the time the ball is in contact with the club. 3. In a circus act, a IO-kg dog is trained to jump onto a 2.0-kg skateboard moving with a velocity of 0.3 m/s. At what velocity does the dog jump onto the skateboard if afterward the velocity of the dog and skateboard is 0. 10 m/s? 4. A metal sphere with a mass of 100.0 g rolls along a frictionless surface at 10.0 mfs and strikes a stationary sphere having a mass of 100.0 g. The rst sphere stops completely. At what speed does the second sphere move away from the point of impact? 5. A ball with a mass of 10 g is moving at 15 m/s. It collides with a second ball with a mass of 30 g moving at 5 m/s in the same direction. Aer the collision, the 10-g ball moves at 6.0 m/s. How great is the change in momentum of the 30-g ball? 6. A 2.0-kg dog running at a speed of 5.0 m/s jumps onto a stationary skateboard that has a mass of 3.0 kg. How long will it take a force with a magnitude of 9.0 N to stop the skateboard and dog