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WalesPhysicsQuick questions
Unit 3 Oscillations and Nuclei
Quick questions on Circular motion: angular velocity and centripetal force - WJEC A-Level Physics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is angular velocity?Show answer
A point on the rim of a wheel and a point near the hub share the same angular velocity but have different linear speeds, because grows with radius.
What is centripetal force?Show answer
The centripetal force is the resultant force towards the centre. It is not a new kind of force; it is provided by a real force such as tension, gravity or friction. Without it the object would move off in a straight line (Newton's first law).
What is q1?Show answer
A ball on a string moves in a horizontal circle of radius at . Find the tension in the string. [3 marks]
What is q2?Show answer
Explain why an object moving in a circle at constant speed is accelerating. [2 marks]
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