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Question
If the speed of a particle is doubled, what happens to its kinetic energy?
A
It becomes four times larger.
B
It becomes two times larger
C
It becomes $$\sqrt{2}$$ times larger.
D
It is unchanged.
E
It becomes half as large.
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Solution
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Correct option is A. It becomes four times larger. Answer (A). Kinetic energy is proportional to squared speed. Doubling the speed makes an object’s kinetic energy four times larger.
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