BPSC 46th Exam Prelims 2004 Solved Paper

Question : 79 of 150

Marks: +1, -0

You are standing in a lift. The force on the floor of the lift is due to your weight will –

Become zero when the lift moves up with an acceleration of 9.8 $ms^2$
Become zero when the lift moves down with the acceleration of 9.8 $ms^2$
Become zero when the lift moves with an acceleration of 9.8 $ms^2$
Remain unchanged whatever the rate of acceleration of the lift be.

Solution:

Explanation: The force on the floor of the lift is due to your weight will become zero when the lift moves with an acceleration of

9.8 {ms}^{2}

.
When the lift is in stationary position, the scale shows his actual weight and when the lift accelerates upward, the scale shows higher weight. When the lift accelerates downwards the scale shows less weight.

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