1) A person is about to drop a 2 kg steel ball off the edge of a tall building, from a height of 50 meters. Before the ball is dropped, what is the ball's potential energy? (Answer in Joules, to the nearest Joule).
2) A person dropped a 2 kg ball from a height of 50 meters. Just before the ball hits the ground, what is the ball's kinetic energy? (Answer in Joules, to the nearest Joule
3) A person dropped a 2 kg ball from a height of 50 meters. Just before the ball hits the ground, what is the ball's velocity? (Answer in meters per second, to the nearest whole number)
4) A child's toy arrow has a mass of 0.1 kg and is tipped with a suction cup. The child shoot the arrow at 10 m/s and it hits 0.2 kg rubber ball, sticking to it. This result is a totally inelastic collision. How fast will the ball and arrow be traveling together just after the collision? (Answer in meters per second, to the nearest whole number)