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If a belt passes over a drum and its ends are connected to springs, and the drum rotates in the direction shown with friction between the drum and the belt, what will happen?

  1. Both springs will get shorter

  2. Both springs will get longer

  3. Spring 1 will get longer, and spring 2 shorter

  4. Spring 1 will get shorter, and spring 2 longer

The correct answer is: Both springs will get shorter

If the drum is rotating in the direction shown, friction between the drum and the belt will cause the belt to pull on the springs, making them shorter. Option B is incorrect because the friction will cause the belt to pull on the springs, not push them. Option C is incorrect because the direction of rotation will cause both springs to experience a force in the same direction, making them both shorter. Option D is incorrect because the direction of rotation will cause both springs to experience a force in the same direction, making them both shorter, not longer. Therefore, option A is the correct answer.