Question

1. An object of mass 10 kg is placed on the scale pan of a spring balance which is hanged from the ceiling of a lift. If the lift moves up with an acceleration of 3 m/s^2, the reading of the spring balance is (take g=10 m/s^2) (a) 10 N (b) 70 N (c) 100 N. (d) 130 N.

Answer 1

Explanation:

Refer image soln...

T- tension in the spring

a-acceleration....

Free body diagram:

Isolating a body from its surrounding and showing all the forces acting on it.............

Hope it is helpful to you.............