Question

The body is performing uniform circular motion and moving with 10 m/s. Find the centripetal acceleration if radius is 40 cm and time is 4 s​

Answer 1

Explanation:

Answer

Correct option is

B

2.5π

2

cm/s

2

Answer is B.

The distance covered in completing the circle 2πr=2π×10cm.

The linear speed is v=2πr/t=

4s

2π×10cm

=5πcm/s

The acceleration is a=

r

v

2

=

10cm

(5πcm/s)

2

=2.5π

2

cm/s

2

.

Hence, the magnitude of its acceleration is =2.5π

2

cm/s

2

.