Question
Question: A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spr...
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 –
A
49 N
B
24 N
C
74 N
D
15 N
Answer
24 N
Explanation
Solution
mg = 49 , m = 5kg weight = m(g – a)