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An elevator is accelerating upwards with an acceleration of 6 $m / s^{2}$ . Inside it a person of mass 50 kg is standing on a weighing machine which is kept on an inclined plane having angle of inclination 60°. The reading of the weighing machine is:

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160 kg

40 kg

80 kg

50 kg

answer is A.

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Detailed Solution

Reading will be 40 kg

$N - mg \cos 60^{0} = ma \cos 60^{0}$

$N = m \cos 60^{0} (a + g) = 400 N$

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