Question

a fly of mass 10 grams is sitting at the edges of a rotating disc of radius 15 cm . if rotational period of disc of disc is 1.8 seconds find the centripetal force on the fly

Answer 1

Explanation:

Moment of inertia I=

2

mr

2

=

2

10×0.2

2

=0.2 kgm

2

Angular acceleration α=

I

τ

=

0.2

10

=50 rad/s

2

Initial angular velocity w

i

=0

Using w

f

=w

i

+αt

Or w

f

=0+50×6=300 rad/s