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Applying NLM along 3 Axis

A man is stan...

Question

A man is standing on a weighing machine placed in a lift, when stationary, his weight is recorded as 40 kg. If the lift is accelerated upwards with an acceleration of $2 m / s^{2}$ , then the weight recorded in the machine will be $(g = 10 m / s^{2})$

A

32 kg

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B

40 kg

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C

42 kg

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D

48 kg

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Solution

The correct option is D
48 kg

R = m(g +a) = 40(10 + 2) = 480 N or 48kg

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