man hangs his bag on the spring balance attached to the ceiling of a lift and the spring reads 5 N, when the lift is stationary. If the lift moves downwards with an acceleration of 6 m/s2, the reading of the spring balance will be
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Answer:
24N
Step-by-step explanation:
A spring balance gives the measure of the spring force in it
When the lift is stationary, Spring reads 49 N which is the balance of the net downward force acting on the Bag
Here it is Mg for the first case
Mg = 49
M = 49/9.8 = 5 kg
Therefore mass of the bag is 5 kg
When the life moves downward with acceleration of 5m/s2
A pseudo force of M times 5 acts on the bag in upward direction
Therefore net force on the bag in downward direction is Mg−5M
Net downward force = 49−25 N
Net downward force = 24 N
Which will be the reading of the spring this time
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