A cannonball with a mass of 1.0 kilogram is fired horizontally from a 500-kilogram cannon, initially at rest, on a horizontal, frictionless surface. The cannonball is acted on by an average force of 8000 newtons for 0.1 second. What is the magnitude of the change in momentum of the cannonball during firing? a. 0 kg•m/s b. 800 kg•m/s c. 8000 kg•m/s d. 80000 kg•m/s
The change in momentum of an object can be calculated using the equation:
Change in momentum = Force x time
In this case, the force acting on the cannonball is 8000 Newtons and the time for which the force is applied is 0.1 seconds.
Change in momentum = 8000 N x 0.1 s
= 800 kg·m/s
Therefore, the magnitude of the change in momentum of the cannonball during firing is 800 kg·m/s.
Answer: b. 800 kg·m/s