Question

In a bicycle the radius of rear wheel is twice the radius of the front wheel. If rf and rr are the radii vf and vr are the speeds of top most points of wheels, then?

(a) vr=2vf

(b) vf=2vr

(c) vr=vf

(d) vr is lesser than vf

This question was posed to me in an online quiz.

This is a very interesting question from Significance of Moment of Inertia in section Laws of Motion of Engineering Physics I

Answer 1

Right option is (c) vr=vf

Easy explanation: Speeds of the top most points of both wheels will be equal and equal to that of centre of mass of the car.