![]() ![]() When things move in circular motion they are changing direction constantly. ![]() (They are actually elliptical orbits in real life but ignore this for this topic) ![]() These are all examples of circular motion. Or when Earth orbits the sun, or when the moon orbits the Earth. For example, when a car goes around a corner, it is undergoing circular motion. What's important here is that the distance between the body and the 'point' remains constant during the curve. Uniform circular motion: Object with circular trajectory and constant angular velocity.Ĭircular motion is the type of motion that is undergone when a body curves around some 'point'. What are the characteristics of circular motion? Since the circumference is given by l = θ × r The linear velocity is V = ω r (ms -1) Symbol = VĪn object spinning can have a linear speed based on the distance a point on the circumference or an angular speed based on the angle. Linear speed: Change in distance of a point on the circumference per second. For example, think of the rpm, (revolutions per minute) of engines, and the periods of planets in the Solar System expressed in years.Īngular velocity: Change in angle per second. Note that we often encounter different units when discussing the circular motion. These two variables are related through f = 1 / T. Remember $$1Hz=1s^−1$$, or one revolution per second.
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