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Question 30225
JEE Physics · Medium

Laws of Motion and Friction: String Constraint MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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String ConstraintMediumQuestion 30225

Question

In a pulley system, if one mass moves down by x, the other moves:
  1. A
    By x downward as well
  2. B
    By x upward
    Correct
  3. C
    By 2x upward
  4. D
    By x/2 upward

Correct answer

By x upward

Explanation

For a simple (single) pulley, string length is constant, so if one end goes down by x, the other goes up by x. This is the string constraint.

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