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A soldier loads a 10 $\mathrm{kg}$ cannonball into a 300 kg cannon that is initially at rest on the ground. What is the recoil speed of the cannon if the cannonball is fired with a horizontal velocity of 300 $\mathrm{m} / \mathrm{s} ?$(A) 5 $\mathrm{m} / \mathrm{s}$(B) 7.5 $\mathrm{m} / \mathrm{s}$(C) 10 $\mathrm{m} / \mathrm{s}$(D) 15 $\mathrm{m} / \mathrm{s}$

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Chapter 4

Practice Test 4

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the initial speed off again is the cannonball is there also? The initial momentum is zero with the final moment of off cannon is Mars off a cannon times Dave lost your cannon, plus Ah, the mass of a cannonball plus velocity ofa cannonball can move, then solving for not plus here. Sorry. So this is we lost pieces off Cannonball. Then we console for her E c b. So we see this accuse us A minus M. C. We see divided by myself again in both substituting the values which is a minus 10 does 300 300 divided by 300 gives us so they're lost your cannonball minus 10 meters per second. So our option C is the right answer.

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