SAT Subject Physics Practice Question 404: Answer and Explanation

Next steps

Question: 404

10. For question above, what is the magnitude of the acceleration of the pile driver while it drives the nail into the board?

A. -165 m/s2
B. -800 m/s2
C. -1600 m/s2
D. -2000 m/s2
E. -3200 m/s2

Correct Answer: B


The correct answer is (B). The velocity of the pile driver at the time it first contacts the head of the nail is . Since, by conservation of energy, . V is also the original velocity as the nail is driven into the wood for a distance of .0245m. Stating the equations:

Previous       Next