Laws of MotionMedium
Question
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/s2, the reading of the spring balance will be
Options
A.24 N
B.74 N
C.15 N
D.49 N
Solution
Reading of spring balance = m(g - a) = 5 × 4.8 = 24 N
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