Question

A mass is suspended from a vertical string in the cabin of a lift moving uniformly upwards, then tension in the string is: Tknot=weight of the block)
Options
1)T=Tknot

2)T>Tknot

3)T
4)T=0

Answer 1

Annswer 1st option as there is constant acceleration

Explanation:

Answer 2

Answer:

T>Tknot.

Explanation:

When the elevator is moving upwards uniformly that means it is having constant acceleration of a. So, the net force will be F +f where F is the force due to gravity and the f is the reaction force which the body experience due to its own weight.

So, now when the body is moving upwards hence the weight of the body will increase hence the tension will be greater than the weight of the body which is Tknot.