Q20 of 139 Page 41

What is the difference between uniform linear motion and uniform circular motion? Explain with examples.























Uniform linear motion



Uniform circular motion



It is uniform motion along a linear path or a straight line



is uniform motion along a circular path



The direction of motion is fixed



The direction of motion changes continuously



it is not accelerated



it is accelerated



e.g.: a car running with uniform speed of 10km/hr on a straight road.



For e.g.: motion of earth around the sun.




More from this chapter

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18

Write the formula to calculate the speed of a body moving along a circular path. Give the meaning of each symbol which occurs in it.

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Explain why, the motion of a body which is moving with constant speed in a circular speed in a circular path is said to be accelerated.

 21

State an important characteristic of uniform circular motion. Name the force which brings about uniform circular motion.

 22

Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5 m/s2.