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The displacement-time graph of a lift cl...

The displacement-time graph of a lift climbing from the ground floor to the top of the building is given here.

Which of the following statements are true about the graph?
I. At point P, the lift is stationary.
II. The lift is slowing down from point Q to point R.
III. At point R, the lift is at rest.

A

I and III only

B

II and IV only

C

I, II and III only

D

II, Ill and IV only

Text Solution

Verified by Experts

The correct Answer is:
C
The time rate of change of displacement gives velocity of a moving abject.
From the given graph, we see the slope (rate of change of displacemtn with tim) decreases as we move from Q to R and at R the curve becomes flat. Therefore , lift is stationary at P and R.
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