The normal reaction on a body placed in a lift moving up with constant acceleration 2 m s - 1 is 120 N . Mass of the body is (Take g = 10 m s - 2 )

Question

The normal reaction on a body placed in a lift moving up with constant acceleration 2 m s - 1 is 120 N . Mass of the body is (Take g = 10 m s - 2 ), 10 kg, 15 kg, 12 kg, 5 kg

MARKS App · Accepted Answer

From force diagram shown in figure, N - m g = m a 0 or 120 - m g = 2 m ∴ m = 120 g + 2 = 120 10 + 2 = 10 kg

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