An object’s momentum is defined as the product of its mass and its velocity. When the superball strikes the wall, its initial momentum is 400 kg⋅m/s (40 g*10 m/s). After it bounces off the wall, itsMomentum is 280 kg⋅m/s (40 g*7 m/s). The change in momentum of the superball is thus 400 kg⋅m/s - 280 kg⋅m/s =120 kg⋅m/s.
The force between the ball and the wall can be determined using Newton’s second law of motion, which states that the force acting on an object is equal to the rate of change of its momentum. As the bounce lasted 0.1s, the force between the ball and the wall would be equal to 1200 kg⋅m/s2 (120 kg⋅m/s/
0.1 s). This is the average force exerted by the wall on the superball during the 0.1s time interval.
Answers & Comments
An object’s momentum is defined as the product of its mass and its velocity. When the superball strikes the wall, its initial momentum is 400 kg⋅m/s (40 g*10 m/s). After it bounces off the wall, itsMomentum is 280 kg⋅m/s (40 g*7 m/s). The change in momentum of the superball is thus 400 kg⋅m/s - 280 kg⋅m/s =120 kg⋅m/s.
The force between the ball and the wall can be determined using Newton’s second law of motion, which states that the force acting on an object is equal to the rate of change of its momentum. As the bounce lasted 0.1s, the force between the ball and the wall would be equal to 1200 kg⋅m/s2 (120 kg⋅m/s/
0.1 s). This is the average force exerted by the wall on the superball during the 0.1s time interval.