a) A truck with 0.420 m radius tires travels at 32.0 m/s. a) What is the angular velocity of the rotating tires in radians per second? b) What is this in rev/min? b) How much work does a supermarket checkout attendant do on a can of soup he pushes 0.600 m horizontally with a force of 5.00 N? Express your answer in joules and kilocalories.