Question

What is circular motion? is it acceleration motion or circular motion

Answer 1

circular motion-when an body moves with uniform speed in circular path it is called uniform circular motion.

Answer 2

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The motion of a particle along a circular path is called circular motion.Circular motion of an object is accelerated motion.

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• Uniform circular motion
• Non uniform circular motion.

➣ UNIFORM CIRCULAR MOTION :-

When a body moves in a circular path the direction of motion changes continously . So, even the body matains a constant speed the velocity is not constant since the direction changes continuously. Hence , the uniform circular motion is a motion in which the speed is constant and the velocity changes continuously .

➣ NON UNIFORM MOTION :-

The motion of a body along a circular path in which the both speed and velocity changes constantly is called Non uniform circular motion .

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SOME TERMS RELATED TO CIRCULAR MOTION :-

➸ ANGULAR DISPLACEMENT :-

The angle swept by the radius vector from one position to other position is called Angular displacement .It is represented by θ . Units of angular displacement is radian denoted by rad

Angular displacement of a particle undergoing circular motion of radius 'r' is given by

$\large\rm\bold{\boxed{\theta\:=\frac{S}{r}}}$

Where ,

• S is Linear displacement (Length of the arc through which the body has moved )
• r is Radius
• θ is Angular displacement

➸ ANGULAR VELOCITY :-

Angular displacement per unit time is called Angular velocity . Units of Angular velocity are rad/sec. Angular velocity is denoted by ω (omega).

Angular velocity is given by ,

$\large\rm\bold{\boxed{\omega\:=\:\frac{\theta}{t}}}$

Where ,

• ω is Angular velocity
• θ is Angular displacement
• t is time

➸ ANGULAR ACCELERATION :-

Angular velocity per unit time is called Angular acceleration.Units of angular acceleration are rad/s² . Angular acceleration is denoted by α

$\large\rm\bold{\boxed{\alpha\:=\:\frac{\omega}{t}}}$

Where ,

• ω is angular velocity
• α is Angular acceleration
• t is time