Question

If a cycle wheel of radius 0.4 m completes one revolution in one second, then acceleration of the cycle is

(A) 0.4 π m/s² 

(B) 0.8 π m/s² 

(C) 0.4π²m/s² 

(D) 1.6π² m/s²

Answer 1

Answer is (D) 1.6π² m/s²

Using,

ω = 2πn = 2π x 1 = 2π rad/s

a = rω² = 0.4 x (2π)² = 0.4 x 4 π² 

a = 1.6 π² m/s²