Question

Find distance and displacement of a body in each of the following situations
a) A body travels 25% of the circumference of a circular path having radius "r" cm

Answer 1

Answer:

Let the object start moving from A and its 25% completed to B.

Then the distance will be 2pie r/4

as u know that circumference of circleis 2pie r hence its 25% will be 2pie r/4

=pie r/2

=22r/7/2

=44r/7= Distance

In fig 2

AO and BO are radious

By Pythagoras therom

(AB)2= (AO)2+(BO)2

=(AB)2= r2+r2

Then AB= root r2+r2 = Displacement

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