A man of mass 60 kg is standing on a spring balance inside a lift. lf the lift falls freely downwards, then the reading of the spring balance will be

Question

A man of mass 60 kg is standing on a spring balance inside a lift. lf the lift falls freely downwards, then the reading of the spring balance will be (A) zero (B) 60 kgf (C) < 60 kgf (D) > 60 kgf

Tardigrade Admin · Accepted Answer

When lift falls freely downward, then mg - R = ma Here, a =g ∴ R =0 Hence, reading of spring balance is zero.

Q. A man of mass 60 kg is standing on a spring balance inside a lift. lf the lift falls freely downwards, then the reading of the spring balance will be

zero

60 kgf

< 60 kgf

> 60 kgf

60 kg+ weight of the spring

When lift falls freely downward, then
mg - R = ma
Here, a =g
$∴$ R =0
Hence, reading of spring balance is zero.