Texts: A long thin rod can rotate about one of its endpoints. The mass of the rod is 0.152 kg and its length is 0.31 m. The rod is initially rotating at 0.22 rev/s. A motor is turned on and the rod speeds up uniformly to 0.45 rev/s in 1.6 min.

1. How many revolutions did the rod make in 1.6 min?
2. How many revolutions must the rod make for its angular speed to increase from 0.22 rev/s to 0.45 rev/s?
3. How much time does it take for the rod's angular speed to increase from 0.45 rev/s to 0.78 rev/s?
4. When the rod rotates at an angular speed of 0.78 rev/s, what is the linear speed at the outer endpoint of the rod (i.e. the endpoint on the opposite side from the axis of rotation)?
5. What is the rotational kinetic energy of the rod when its angular speed is 0.78 rev/s? Express rotational kinetic energy in Joules. Assume constant angular acceleration.

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