A disc rotates about its axis of symmetry in a horizontal plane at a steady rate of…
PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A disc rotates about its axis of symmetry in a horizontal plane at a steady rate of 3.5 revolutions per second. A coin placed at a distance of 1.25cm from the axis of rotation remains at rest on the disc. Find the coefficient of friction between the coin and the disc. ( g=10m/s2 )
(1) 0.5
(2) 0.7
(3) 0.3
(4) 0.6