Q55 of 139 Page 22

A body is moving along a circular path of a radius R. What will be the distance travelled and displacement of the body when it completes a revolution?

Distance travelled in half a rotation of a circular path is equal to the circumference of semi-circle, i.e., =2pR.

Displacement= 0


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53

One of the following is not a vector quantity. This one is :

A. displacement B. speed


C. acceleration D. velocity

 54

Which of the following could not be a unit of acceleration?

A. km/s2


B. cm s2


C. km/s


D. m/ s2

 56

If on a round trip you travel 12 km and then arrive back home:

(a) What distance have you travelled?


(b) What is your final displacement?

 57

A body travels a distance of 6 km towards East, then 4 km towards North and finally 9 km towards west.

(i) What is the total distance travelled?


(ii) What is the resultant displacement?