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Q.

In one second a particle goes from a point A to another point B moving in a semi circle of radius one meter as shown in the figure. The average speed                 

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a

1 ms−1

b

2 ms−1

c

3.14 ms−1

d

0 ms−1

answer is A.

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Detailed Solution

Radius (R) = 1m, time = 1s

Distance travelled in semicircle (s)=πR⇒v=st=πR1=3.14×11=3.14

v=3.14ms−1

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