The kinetic energy of a body is 100 J and momentum 50 kg m/s. Mass is MCQ with Answer and Explanation

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The kinetic energy of a body is 100 J and momentum 50 kg m/s. Mass is

A. 12.5 kg

B. 25 kg

C. 4 kg

D. 2 kg

Answer: Option A

Solution (By JKSSB Mock Tests)

K = p²/(2m) => 100 = 2500/(2m) => m = 2500/200 = 12.5 kg.

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Correct Answer: Option C

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A charged particle enters a magnetic field at 90° to the field. Its kinetic energy

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Correct Answer: Option C

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