Subject Test Physics

Question 19 of 36

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An object with mass $m$ and speed $v_{0}$ directed to the right strikes a wall and rebounds with speed $v_{0}$ directed to the left.

The change in the object's kinetic energy is

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$negative m text end text v subscript 0 squared$

Correct Answer:

No

$negative 1 half m invisible times text end text v subscript 0 squared$

Correct Answer:

No

$text Zero end text$

Correct Answer:

Yes

$1 half m invisible times text end text v subscript 0 squared$

Correct Answer:

No

$m invisible times text end text v subscript 0 squared$

Correct Answer:

No

View Correct Answer

The correct answer is zero. The kinetic energy of an object of mass $m$ moving at speed $v$ is $\frac{1}{2} m v^{2}$ . Since the object has the same speed before and after striking the wall, its kinetic energy does not change.

Question Difficulty:

medium

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Subject Test Physics

Question 19 of 36

Learn more about plans to discontinue SAT Subject Tests

Select an Answer

View Correct Answer