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Question

A ball is thrown vertically upward from the top of a cliff. Take the starting position of motion as origin and upward direction as positive. Column I specifies the position, velocity and /or acceleration of the particle at any instant. Column II given their signs (+) or () at that moment. Match the columns
Column IColumn IIi.When the ball is above the pointa. always positive of projection, its displacement is ii. When the ball is above the point b. always negativeof projection, its velocity is iii. When the ball is above the point c. May be positive or may be of projection, its acceleration is negative iv.When the ball is below the point d. may be zero of projection, its acceleration is

A
i.c,ii.b,iii.a,iv.b.
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B
i.a.,ii.c.,iii.a,iv.d.
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C
i.a.,ii.c.,iii.b.,iv.b.
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D
i.b,ii.c.,iii.a,iv.b.
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Solution

The correct option is C i.a.,ii.c.,iii.b.,iv.b.
i.a.,ii.c.,iii.b.,iv.b.
When the ball is above the point of projection, its displacement is always positive, but its velocity may be positive (when moving up), zero (at top point) or negative (when coming down).
Acceleration is always directed downward, so it is always negative.

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