Question

A particle of mass m start from A and it make 5 turns on a circular path of radius R and come back to A. Which of the following quantity is zero?

Path length

Average speed

Displacement

None of these​

Answer 1

Answer:

`rArr v = sqrt(bR) t (dv)/(dt) = sqrt(bR)`

For circular motion work done by normal force is zero. For tangential forces.

`F_(t)=m(dv)/(dt)=m sqrt(bR) P=F_(t).v = F_(t) v cos theta`

as `theta = 0^@`, `P = F_(t) v = mbRt`

Average power `= (underset(0) overset(T) intP(t)dt)/(underset(0) overset(T)int dt) = underset(0) overset(T) int(mbRTdt)/(T)`

=`(mbR(t^(2)//2)_(0)^(T))/(T) = (mbRt)/(2)`.

Answer 2

Answer:

displacement

Explanation:

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