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20-01-2018
Physics

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A cannonball with a mass of 8.3 kg is fired from a cannon that has a mass of 949.3 kg. The cannonball is fired with a speed of 187.9 m/s, and it takes 0.0 seconds for the cannonball to leave the cannon.

what is the recoil speed?

Respuesta :

20-01-2018

conservation of momentum
mass(ball) × speed(ball) = mass(cannon) × speed(cannon)
(8.3 kg) × (187.9 m/s) = (949.3 kg) × v
1.64 m/s = v

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