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Q.

As shown in the figure, Tarzan travels from one place to another by swinging in the forest. Assume that the rope is just long enough to swing from point A to point ^8, what is his initial speed in order for him to reach point B ?

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a

2 ms-1

b

4 ms-1

c

8 ms-1

d

6 ms-1

answer is D.

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Detailed Solution

By using Work-Energy Theorem W=ΔKE
−mg(0.2)=0−12mv2⇒v=2ms−1

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