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Physics Worksheet
🔄 Circular Motion
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After this worksheet you can
Understand: Uniform Circular MotionUnderstand: Centripetal AccelerationUnderstand: Centripetal ForceUnderstand: Period and Frequency📚 Quick Recap
An object moving in a circle is constantly changing direction, even at constant speed — this requires a special kind of acceleration and force pointed toward the circle's center.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1A car moves at 15 m/s around a curve of radius 30m. Find centripetal acceleration.
2A 3 kg ball moves in a circle of radius 1.5m at 6 m/s. Find centripetal force.
3An object has period 5s. Find its frequency.
4An object has frequency 4 Hz. Find its period.
🧮 Section B · Problem Solving ● INTERMEDIATE 4 × 3 = 12
5Find the angular velocity of an object with period 1 second.
6A satellite orbits at radius 7000km with speed 7.5 km/s. Find its centripetal acceleration.
7What provides the centripetal force for a car turning on a flat road?
8What provides the centripetal force for the Moon orbiting the Earth?
🚀 Section C · Challenge ● CHALLENGE 2 × 2 = 4
9If the radius of a circular path doubles while speed stays the same, how does centripetal acceleration change?
10If speed doubles while radius stays the same, how does centripetal force change?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/12 C ___/4 Total ___/20
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✂ answer key — fold or cut before handing out
1 = 7.5 m/s^2 2 = 36 N 3 = 0.2 Hz 4 = 0.25 s | 5 = omega=2*pi/1≈6.28 rad/s 6 = a_c=v^2/r=56.25/7000≈0.00804 km/s^2 7 = Friction between the tires and the road 8 = Gravity | 9 = It is halved, since a_c=v^2/r is inversely proportional to r 10 = It quadruples, since F_c is proportional to v^2