Question

If an athlete takes t seconds to go once around a circular path of radius r, the velocity v is given by:​

Answer 1

Answer:

what are the options of this question

Answer 2

Question- If an athlete takes t seconds to go once around a circular path of radius r, the velocity v is given by a) 2πr b) π/t c) 2πr/t d) None of these.

The velocity is 2πr/t. (Option c)

Given:

Radius=r

Time=t

To find:

The velocity

Solution:

We can obtain the required velocity by dividing the distance covered by the athlete by the time taken by him.

The distance covered=The circumference of the circular path

=2×π×radius

=2πr

Now, the required velocity=Distance covered/ time taken

Using values,

v=2πr/t

Therefore, the required velocity is 2πr/t.

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