Question : How long does it take for the platform to make one revolution?
A spring scale on a rotating platform indicates that the horizontal force on a 0.491 kg mass is 1.64 N when the mass is 2.04 m from the axis of rotation. How long does it take for the platform to make one revolution?
platform scales

Best answer:

Answer by MR
net force = scale reading
m(ω²r) = F

(0.491 kg)(ω²)(2.04 m) = 1.4 N
ω = 1.182 rad/s

(2π rad/rev)(s / 1.182 rad) = 5.31 s/rev