Uniform circular motion — KCSE Physics
KCSE Physics · 37 practice questions · 9 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
Define angular displacement and angular velocity in radians
Describe experiments to illustrate centripetal force and state the relations F=mv²/r and F=mrω²
Explain applications including centrifuge, vertical/horizontal circles and banked tracks
Define angular velocity, angular displacement and the radian; relate linear and angular velocity; calculate periodic time
Define centripetal acceleration, explain why circular motion involves acceleration, and calculate centripetal acceleration
State factors affecting centripetal force; calculate tension, friction and centripetal force in horizontal circular motion
Analyse vertical circular motion: tension at top and bottom, minimum speed, pail of water, path after string cuts
Describe applications of circular motion: centrifuges, banked roads, speed governors, spin dryers, conical pendulum
Describe satellite and orbital motion; state escape velocity; explain why gravity provides centripetal force for orbits
Sample Questions
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State the relationship between the tension in the string and the minimum speed of a pail of water at the top of a vertical circular path. (3 marks)
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Name two factors that affect the centripetal force required for an object moving in a horizontal circular path. (2 marks)
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List three factors that affect the centripetal force required for an object moving in a horizontal circle. (3 marks)
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In a physics experiment, a student swings a ball attached to a string in a horizontal circle. (a) Identify the role of centripetal force in this scenario. (2 marks) (b) State the relationship between the centripetal force and the speed of the ball. (2 marks)
Why Practise Uniform circular motion?
KNEC Aligned
Questions match the KCSE syllabus objectives and exam format exactly.
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