SAT Subject Physics Practice Question 372: Answer and Explanation

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Question: 372

68. A tugboat pulls on an 84,000N barge with a cable having a breaking strength of 15,000N. The maximum acceleration the tugboat can apply to the barge without the cable breaking is

A. .75 m/s2
B. 1.0 m/s2
C. 1.25 m/s2
D. 1.5 m/s2
E. 1.75 m/s2

Correct Answer: E


The correct answer is (E). The maximum tension the cable can withstand is 15,000N.This is the limit to applied force. The barge weighs 84,000N, which is a mass of 8571 kg. Use F = ma to solve the problem.

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