A mass of 0.5kg is whirled in a vertical circle of radius 2m at a steady rate of 2 rev/s. Calculate the centripetal force
-
A.
164N -
B.
160N -
C.
158N -
D.
172N
Correct Answer: Option C
Explanation
ω = 2πF = 2π × 2 = 4πrad(^{-1})
Centripetal force = mrω(^2)
⇒ 0.5 × 2 × (4π)(^2)
⇒ 157.75N
There is an explanation video available below.