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# Circular Motion

The wheels on the bus go round and round, but can you name all the forces in a rotating reference frame? Learn to derive these and more through sheer force of reason in Circular Motion.

A \( 5 \text{ kg} \) rock swings in a vertical circle of radius \( 2 \text{ m}. \) The speed of the rock as it passes its lowest point is \( 10 \text{ m/s}. \) What is the tension \( T \) acting on the rock as it passes its lowest point?

The gravitational acceleration is \( g= 10 \text{ m/s}^2. \)

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