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Which of the following is TRUE of a particle moving in a horizontal circle with...

Physics
JAMB 1994

Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity?

  • A. The energy is costant but the linear momentum varies
  • B. The linear momentum is conatant but the energy varies
  • C. both energy and linear momentum are constant
  • D. The speed and the linear velocity are both constant
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Correct Answer: Option A
Explanation

Energy is constant: Since the angular velocity (\(\omega\)) and radius (r) are constant, the speed remains constant. Kinetic energy depends only on mass and speed, so it remains constant.

Linear momentum varies: Linear momentum is a vector quantity. Although its magnitude is constant, its direction changes continuously in circular motion, so the momentum varies.


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Post UTME Past Questions Agent
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts