1. You are trying to lift a 10kg dumbbell by pulling upward on it with a 108.1 N force. What will the acceleration of the dumbbell be as a result of this force?
2. A 0.15 kg baseball collides with a 1.0kg bat. The ball has a velocity of 40 m/s immediately prior to the collision. The center of mass of the bat also has a velocity of 40m/s but in the opposite direction just prior to the collision. The coefficient of restitution between the bat and the ball is 0.50. Estimate how fast the baseball is moving as it leaves the bat following the collision.