Question

Shelly started pushing a merry-go-round (MGR) with 3 people on it and as she pushed the MGR, she ran around with the MGR so that she could apply a constant force of 293 N for 3.9 seconds. The radius of the MGR or moment arm for the applied 293 N force was 1.8 m and the total mass of the MGR including the 3 individuals on it was 254 kg. If the radius of gyration of the MGR and 3 people combined was 1.75 m, what angular velocity in degrees/s was achieved by the MGR if Shelly started the 3.9 second push with the MGR originally in a stopped position? Assume the 293 N force was applied tangent or 90° to the radius of the MGR and that there was no frictional torque present = 2.644

If at the same time that Shelly let go of the MGR and stopped pushing, one of the people on the MGR started dragging her foot on the ground to stop the MGR, how long would it take to stop the MGR if the dragging foot produced a frictional torque of 400 Nm

Answer 1