Physics Question:

When a person whirls a rock on the end of a string and maintains it in uniform circular motion, the force exerted on the rock is most accurately referred to as:

1. centrifugal
2. centripetal
3. rotational
4. center fleeing

Answer: B

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Scientists at Brookhaven National Laboratory invented the forerunner of the PET, which was subsequently found to be well- suited for wide use in institutions around the world for which of the following:	Which of the following is measured in Hertz?