A circular saw blade completes 1200 revolutions in 40 rm s, Ask an Expert

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Q. A circular saw blade completes 1200 revolutions in 40 rm s while coasting to a stop after being turned off. Assuming steady deceleration, what are (a) angular deceleration and (b) initial angular speed?

Q. A sled weighing 200-N is held in place on a frictionless 50degree slope by a rope attached to a stake at the top of the slope. The rope is parallel to the slope. What is the normal force of the slope acting on sled?

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