A cannon with a mass of 850 kg is stationary, and loaded with a 10 kg cannonball. Upon firing, the cannonball is moving at 93.5 m/s and the cannon is moving backwards at 1.1 m/s. What is the difference between the kinetic energy of the system before and after the explosion?

Newton's third law states that for every action there must be an equal and opposite reaction, so the forces on the cannon and cannonball are equal in magnitude (but not direction). and the mass of the cannon is larger than the mass of the cannonball, so the acceleration is lesser for the cannon than for the cannonball.

Explanation:

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