Question

When a body completes two rotations in a circular path of radius 0.5m. How

much work it will do?​

Answer 1

Answer:

As the average acceleration is change in velocity over the time taken,

In this case when the half revolution is over the direction in the speed changes by 180 degrees,

so the change in velocity =5−(−5)=10 m/s

The time taken to cover this distance =  

5

π∗r​  

=  

5

5π  

=π (as the distance travelled is semicircle)

So, average acceleration =  

π

10  

ms  

−2

Explanation:

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