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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 A, the lift is stationary.
(ii) Velocity of lift is decreasing from point B to C.
(iii) At point C, the lift is at zero velocity.
(iv) Velocity of lift is minimum at B.

A

(i) and (iii) only

B

(ii) and (iv) only

C

(i), (ii) and (iii) only

D

(ii), (iii) and (iv) only

Text Solution

Verified by Experts

The correct Answer is:
C
According to displacement time graph: At point A, displacement is zero so lift is stationary. From point A to point 8, lift is moving with increasing speed. At point 8, lift has maximum velocity. After point 8, speed of lift starts decreasing till point C and at point C, lift stops, i.e., it has zero velocity at point C.
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