An object with a mass of $7 kg$ is traveling in a circular path of a radius of $9 m$ . If the object's angular velocity changes from $5 Hz$ to $1 Hz$ in $8 s$ , what torque was applied to the object?

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Answer 1 · 2016-01-28T13:23:10

-283.5Nm

we know,
$tau=Ialpha$
$=mr^2(deltaomega)/(deltat$
$=mr^2(omega_2-omega_1)/(deltat)$
$=7*9^2(1-5)/8$
$=567*(-4)/8$
$=-283.5Nm$

An object with a mass of 7 kg 7 kg is traveling in a circular path of a radius of 9 m9 m. If the object's angular velocity changes from 5 Hz 5 Hz to 1 Hz 1 Hz in 8 s 8 s, what torque was applied to the object?