A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring balance reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5 m/s², the reading of the spring balance will be (g = 9.8 m/s²) (a) 74 N (b) 15 N (c) 24 N (d) 49 N

Answer: (c). m = 49/9.8 = 5 kg. Reading = m(g - a) = 5(9.8 - 5) = 24 N So the answer is (c) 24 N.

A spring balance is attached to the ceiling of a lift. A man hangs… | MHT CET 2021 (24 Sep, Shift 1)

Q12MHT CET 2021 · 24 SEP · SHIFT 1Easy

Apparent Weight & Lift

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring balance reads $49\text{ N}$ , when the lift is stationary. If the lift moves downward with an acceleration of $5\text{ m/s}^{2}$ , the reading of the spring balance will be $(g = 9.8\text{ m/s}^{2})$

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Answer: (c)

$m = \frac{49}{9.8} = 5$ kg.
Reading $= m(g - a) = 5(9.8 - 5) = 24$ N
So the answer is (c) 24 N.

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