Question

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring balance reads 49 N, when the lift is stationary. Determine the reading of the spring balance, if the lift moves downward with an acceleration of 5 $m{s}^{-2}$.

Answer 1

Reading $=m\times 9.8Newton$

$mass=5kg$

Nowif lift moves downwards with the acceleration $5m/s^2$ on upward pseudo force will act on it

$gett=9.8-5=4.8m/s^2$

Reading $=4.8\times 5=24Newton$