46th B.P.S.C. (Pre) 2004
You are standing in an elevator. The force exerted by your weight on the floor of the elevator
awill be zero when the lift goes up with an acceleration of 9.8 m/s²
bwill be zero when the lift comes down with an acceleration of 9.8 m/s²✓ Correct
cZero when the lift moves in any direction with an acceleration of 9.8 m/s²
dwill not be affected by the change in the rate of acceleration of the lift
Explanation
When the elevator comes downward with acceleration 9.8 m/s², the person exerts no pressure on the lift floor because Earth’s gravitational acceleration is 9.8 m/s². Hence, at that time, the force exerted by the person on the floor becomes zero.
general-mental-ability