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 \[5\text{ }m/{{s}^{2}}\], the reading of the spring balance will be:
A)49 N
B)24 N
C)74 N
D)15 N
Correct Answer:
A
Solution :
Spring mass system does not depend on acceleration.