A flywheel of moment of inertia 0.4 kg `m^(2)` and radius 0.2 m is free to rotate about a central axis. If a string is wrapped around it and it is pulled with a force of 10N. Then its angular velocity after 4s will beA. `10 rad s^(-1)`B. `5 rad s^(-1)`C. `20 rad s^(-1)`D. None

A flywheel of moment of inertia 0.4 kg `m^(2)` and radius 0.2 m is fre

1.	A flywheel of moment of inertia 0.4 kg `m^(2)` and radius 0.2 m is free to rotate about a central axis. If a string is wrapped around it and it is pulled with a force of 10N. Then its angular velocity after 4s will beA. `10 rad s^(-1)`B. `5 rad s^(-1)`C. `20 rad s^(-1)`D. None
Answer» c) As , `rho= F xx r = lalpha` `=l(omega_(2)-omega(1))/t` `therefore` `omega_(2)-omega_(1) = (Fxxrxxt)/l` `=(10 xx 0.2 xx 4)` `=20rads^(-1)`

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A flywheel of moment of inertia 0.4 kg `m^(2)` and radius 0.2 m is free to rotate about a central axis. If a string is wrapped around it and it is pulled with a force of 10N. Then its angular velocity after 4s will beA. `10 rad s^(-1)`B. `5 rad s^(-1)`C. `20 rad s^(-1)`D. None

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