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Question

An insect is taking rounds around a triangle in anti-cloclwise direction with a speed of 1 m/s. The insect starts from A at t = 0. Find its displacement at t = 17 sec.

A
12 m
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B
zero
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C
13 m
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D
5 m
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Solution

The correct option is C 13 m

Perimetre is 12 m. After 17 s, it makes one complete rotation and 5 m into the second rotation.
From the figure, the displacement is 32+22=13.

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