AP Physics 1 Question 294: Answer and Explanation

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Question: 294

2. If two people pull with a force of 1000 N each on opposite ends of a rope and neither person moves, what is the magnitude of tension in the rope?

  • A. 0 N
  • B. 500 N
  • C. 1000 N
  • D. 2000 N

Correct Answer: C



Just focus on one end of the rope. Nothing is moving, so the net force must be 0. If a person pulls with a force of 1000 N and nothing moves, then the resulting tension must also be 1000 N. Additionally, tension is a constant magnitude throughout a string. The direction of the tension can change (as in the case of a pulley system), but the magnitude will remain the same.