Question

4. A particle is moving along a circular path of
radius 5 m with a uniform speed 5 ms. What
will be the average acceleration when the
particle completes half revolution?
10
(a) zero
(b) 10 ms (c) 10πms-2 (d)10/πms-2​

Answer 1

Answer:

c is the answer for your question

Answer 2

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
Please mark me as brain liest