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find the reading of the spring balance.the elevator is going upwith an acceleration of g/10,the pulley and string are light and the pulley is smooth
Considering non inertial frame, a pseudo force of mg/10 will act downwards along with the gravitational force. So the spring balance will measure a weight of m(g + g/10).
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In this case we are observing the motion of body from a non inertial frame of reference(because elevator in accelerating upwards).
so we must consider a pseudo force acting on the body.
this will be equal to product of mass of body attached to spring and the acceleration of the elevator.
pseudo force=mg/10 and tis will be in downward direction.
since the body in hanging from spring balance
spring balance reading=pseudo force+force due to gravity(weight)
=mg+mg/10
==11mg/10
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