Uniform and non-uniform motion

Answer 1

if a body performs motion with constant speed along a circular path,its motion is called uniform circular motion.

here,note that speed remains constant , not velocity. direction of velocity of a body in uniform circular motion, is different at each point on the circular path.

consider a body performing uniform circular motion along the circle of radius'r' in anticlock wise direction. when this object is on points a,b,c,d and e, directions of its velocity are shown.v1=v2=v3=...v5=v

v=distance travelled

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time

=length of circular path

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time

v=circumference

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time

=2pier

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t

here v is also known as linear speed of the body performing uniform circular motion.

Answer 2

In uniform motion, an object moves at a constant speed and in a straight line. In non-uniform motion, the speed or direction of the object changes at different points in time.