Question

A body of mass 2 kg is hung on a spring balance mounted vertically in a lift. If the lift moves up with a constant velocity of 2 m/sec, the reading on the balance will be

• A. 2 kg
• B. 4 kg
• C. Zero
• D. 1 kg

Answer 1

Answer: (A)

2 kg

Answer 2

The lift is not accelerated, hence the reading of the balance will be equal to the true weight.

$R = mg = 2g\mspace{6mu} Newton$ or 2 kg