Physics
Grade-10
Easy
Question
Which law determines the direction of an object’s velocity as it is moving in uniform circular motion?
- Newton’s first law of motion
- Newton’s second law of motion
- Newton’s third law of motion
- Universal law of motion
Hint:
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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