Physics: Uniform Circular Motion

Study Notes

A car starts from rest and covers a distance of 50 m in 10 s and 100 m in the next 10 s, illustrating rectilinear motion.
Examples of rectilinear motion include a bicycle moving on a straight road, a stone falling from hand, and a runner on a 100 m race track.

Any point on a wheel of a bicycle remains at a constant distance from the axis of the wheel and moves around the fixed point, illustrating circular motion.
The motion of the wheel and flywheel of a bicycle is circular motion.
During pedaling, the flywheel moves in a circular motion, while during non-pedaling, it moves in a straight line (rectilinear motion).
The wheel or flywheel of a bicycle can exhibit both circular and rectilinear motion simultaneously.

An object moving along a circular track of radius R through four points A, B, C, and D illustrates uniform circular motion.

Rectilinear motion is where an object moves along a straight line.
Circular motion is where an object follows a circular path during motion.
Examples of circular motion include the motion of the hands of a clock, a child sitting on a merry-go-round, and the blades of an electric fan.

Suspend a small stone with a string, displace it, and release it to observe circular motion.
Hold the stone firmly and whirl it over your head to observe circular motion.
Record observations of the motion of the stone in different scenarios.