1. A circular saw blade 0.6 m in diameter starts from rest and accelerates with constant acceleration to an angular velocity of 100 rad.s-1 in 20 s. Find the a) angular acceleration, b) angle in degrees through which the blade has turned in the 20-s interval, c) the linear velocity of a point in the rim of the saw when the angular velocity is 10 rad.s-1. 2. The angle @ through which a bicycle wheel turns is given by e = a +bt2+ ct3 where a, b, and c are constants. Calculate the a) velocity and b) acceleration of the wheel as a function of time. 3. A grinding wheel 0.2 m in diameter, of mass 3 kg, is rotating at 3600 revolution per minute about an axis through its center. What is its kinetic energy? 4. What is the angular velocity of the hour hand of a clock if it has a length L and mass m? Hint: Always use standard units in your solutions.

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.