A lif is moving with constant acceleration upward. the mass of the object in the lift
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Even if an object is placed in a lift, the mass of the object remains unaffected, since it is independent of the acceleration with which the object is moving, and is rather a property of the material of the object. However, the weight of the object is a property that depends on the mass of the object as well as the acceleration with which it is moving. Hence, inside a lift, the object would feel heavier, since the upwards accelerating lift causes a downward pseudo force, without having any effect on the mass of the object.
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Let lift is moving upward direction with constant acceleration is a and mass of object in the lift is m .
Due to non inertial frame of reference we can't use Newton's law, so first of all we have to convert in inertial frame of reference . Apply Psuedo force opposite direction of its motion.
e.g., Fp = ma [ here Fp is Psuedo force acting just opposite of its motion ]
Now, we can apply Newton's law, so, Net force act on object , Fnet = weight of body + Pseudo force
Fnet = mg + ma = m(g+a) > mg
Mathematically it is clear that when a lift is moving upward direction with a constant acceleration then the weight of object in the lift is greater than weight of object when it is rest.
Due to non inertial frame of reference we can't use Newton's law, so first of all we have to convert in inertial frame of reference . Apply Psuedo force opposite direction of its motion.
e.g., Fp = ma [ here Fp is Psuedo force acting just opposite of its motion ]
Now, we can apply Newton's law, so, Net force act on object , Fnet = weight of body + Pseudo force
Fnet = mg + ma = m(g+a) > mg
Mathematically it is clear that when a lift is moving upward direction with a constant acceleration then the weight of object in the lift is greater than weight of object when it is rest.
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