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A spring balance is attached to the ceil...

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49N, when the lift is stationary. If the lift moves downward with an acceleration of `5m//2^2`, the reading of the spring balance will be

A

49 N

B

24 N

C

74N

D

15N

Text Solution

Verified by Experts

The correct Answer is:
B
`m = (49)/(9.8) = 5kg `
`R = m (g-a) = 5 xx (9.8 - 5) = 24N`
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