Question
Asked Jan 30, 2020
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A bullet with a mass of 3.18 g moves at a speed of 1.50 ✕ 103 m/s. If a tennis ball of mass 58.4 g has the same momentum as the bullet, what is its speed (in m/s)?

Which has greater kinetic energy, the ball or the bullet?
The bullet has greater kinetic energy.
Both have the same kinetic energy.
The ball has greater kinetic energy.
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Which has greater kinetic energy, the ball or the bullet? The bullet has greater kinetic energy. Both have the same kinetic energy. The ball has greater kinetic energy.

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Expert Answer

Step 1

Given information:

The mass of the bullet (mb) = 3.18 g = 0.0038 kg

The bass of the tennis ball (mt) = 58.4 g = 0.0584 kg

The velocity of the bullet (vb) = 1.5 ×103 m/s

Let the velocity of the tennis ball = vt

Step 2

Given the ball and the bullet have the same momentum hence we can write:

Physics homework question answer, step 2, image 1
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Step 3

The kinetic energy of the ...

Physics homework question answer, step 3, image 1
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