What is the magnitude of Hunter the dog's centripetal acceleration when he runs along a circular path of radius 2.0 meters with a tangential speed of 2.2 meters/second? A. 2.2 meters/seconds
B. 4.4 meters/seconds
C. 1.1 meters/seconds
D. 2.4 meters/seconds

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

At the negative terminal of the battery the electron has electric potential energy. what happens to this energy as the electron jumps from the negative to the positive terminal?

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