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A particle travels along the arc of a ci...

A particle travels along the arc of a circle of radius `r`. Its speed depends on the distance travelled `l` as `v=asqrtl` where 'a' is a constant. The angle `alpha` between the vectors of net acceleration and the velocity of the particle is

A

`alpha = tan^(-1) ((2l)/r)`

B

`alpha = cos^(-1) ((2l)/r)`

C

`alpha = sin^(-1) ((2l)/r)`

D

`alpha = cot^(-1) ((2l)/r)`

Text Solution

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The correct Answer is:
A
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