AP Physics 1 Question 82: Answer and Explanation
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2. An object has a kinetic energy of k. If the speed of the object were doubled what would be the resulting kinetic energy?
- A. K
- B. K
- C. 2K
- D. 4K
Correct Answer: D
DK = mv2, so if we double the velocity we don't double the kinetic energy, we actually quadruple it:
K' = m(2v)2 = 4 (mv2) = 4K