Question

A body of mass 2 kg is hung on a spring balance mounted vertically in a lift if the lift moves up with constant velocity of 2 m/s,the raeding on the balance will be?

Answer 1

Explanation:

The body of mass (m) = 2kg

Acceleration of lift in downword direction (a) =g

Let the reading if spring balance be N.

Equation of motion for the body:

ma= mg-N. (Therefore, a=g)

=>N = mg- mg =0

Thus, the spring balance will show zero reading