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

The kinetic energy of a body is 100 J and momentum 50 kg m/s. Mass is
A. 2 kg
B. 4 kg
C. 12.5 kg
D. 25 kg
Answer: Option C
Solution (By JKSSB Mock Tests)
K = p²/(2m) => 100 = 2500/(2m) => m = 2500/200 = 12.5 kg.

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A current of 5 A flows through a 10 Ω resistor for 2 minutes. Heat produced in kJ is
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B. 1 kJ
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Correct Answer: Option D


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Correct Answer: Option C


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Correct Answer: Option A


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