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#