Physics
Grade-10
Easy

Question

Which law determines the direction of an object’s velocity as it is moving in uniform circular motion?

  1. Newton’s first law of motion
  2. Newton’s second law of motion
  3. Newton’s third law of motion
  4. Universal law of motion

hintHint:

Newton's second law of motion that there must be a constant net external force acting on the object

The correct answer is: Newton’s first law of motion


    Because an object in uniform circular motion undergoes constant acceleration (by changing direction), we know from Newton's second law of motion that there must be a constant net external force acting on the object. Any force or combination of forces can cause a centripetal acceleration.

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