A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N , when the lift is stationary. If t - Physics MCQ AIEEE 2003 2026 | ExamTest.live

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

Solution & Step-by-step Explanation

When stationary, the weight is m g = 49 N .Taking g = 9.8 m/s^{2} : m = \frac{49}{9.8} = 5 kg When the lift moves downward with acceleration a = 5 m/s^{2}, the apparent weight (reading) is: R = m (g - a) = 5 (9.8 - 5) = 5 \times 4.8 = 24 N

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

24 N

74 N

15 N

49 N

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