At t0 a grinding wheel has an angular velocity of 20.0, Ask an Expert

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Q. At t=0 a grinding wheel has an angular velocity of 20.0 rad/s. It has a constant angular acceleration of 29.0 rad/s^2 until a circuit breaker trips at time t = 2.20 s. From then on, it turns through an angle 435 rad as it coasts to a stop at constant angular acceleration.

Q. A scaffold of mass 49 kg and length 5.8 m is supported in a horizontal position by one vertical cable at each end. A window washer of mass 77 kg stands at a point 1.0 m from one end.

(a) What is the tension in the cable closer to the painter?
(b) What is the tension in the cable further from the painter?

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