First slide

Introduction-Motion in a straight line

Question

The ratio of the numerical values of the average velocity and the average speed of a body is always

Very Easy

A

Unity
B

Unity (or) less
C

Unity (or) more
D

Less than Unity

Solution

Unity or less since average speed $= \frac{t o t a l d i s t a n c e}{t o t a l t i m e}$ ,Average velocity $= \frac{t o t a l d i s p l a c e m e n t}{t o t a l t i m e}$ ,for a semicircle path covered by a particle distance is greater than displacement, then average velocity is less than average speed, in such case the ratio is less than unity

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