AP Physics 1 Question 359: Answer and Explanation
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7. If an object's kinetic energy is doubled, what happens to its speed?
- A. It increases by a factor of /2.
- B. It increases by a factor of .
- C. It is doubled.
- D. It is quadrupled.
Correct Answer: B
Kinetic energy is related to speed according to the equation . Comparing the new kinetic energy, K', to the original kinetic energy yields