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Question

A ball is thrown upwards, which attains a height of 10 m and comes back to the same position.
i What is the net distance?
ii What is the net displacement?

A
i.10 m,ii.0
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B
i.20 m,ii.0
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C
i.10 m,ii.10 m
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D
i.20 m,ii.20 m
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Solution

The correct option is B i.20 m,ii.0
Since the ball attains height of 10 m and comes back to the same position, we have the values for distance and displacement as
i. Distance is the total path length, so, it will be 10+10=20 m
and,
ii. as the ball returns to the same position, the initial and final positions are same, hence the displacement of the ball will be zero.

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