A man of mass 60 kg stands on a weighing machine in a lift accelerating upward at 2 m/s². Reading in kg wt (g=10) is MCQ with Answer and Explanation

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A man of mass 60 kg stands on a weighing machine in a lift accelerating upward at 2 m/s². Reading in kg wt (g=10) is

A. 60 kg

B. 80 kg

C. 48 kg

D. 72 kg

Answer: Option D

Solution (By JKSSB Mock Tests)

Apparent weight = m(g+a) = 60×12 = 720 N. In kg wt, 720/10 = 72 kg. So machine shows 72 kg. Downward acceleration would show less.

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A body moves along a straight line with v = 2t + 3. Acceleration after 2 s is

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B. 2 m/s²

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Correct Answer: Option B

Explanation:
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