CBSE Class 9 Answered

Dear student,

Suppose an athlete takes t seconds to go once around the circular path of radius r, then the velocity v is given by the relation

distance travelled = circumference of the circle

= 2p r

The following table gives the distance covered by a bus after every 15 minutes.

the motion is non-uniform i.e., it covers unequal distances in equal intervals of time.

Nature of S- t Graph for Non- Uniform Motion and Uses of Graphs

Let us now see the nature of S-t graph for non-uniform motion.

Nature of s-t Graph for Non-uniform Motion

Fig (a) represents the S-t graph when the speed of a moving object increases and Fig (b) represents the S-t graph when the speed of a moving object decreases.

From the nature of S-t graph we can conclude whether the object is moving with uniform speed or variable speed.

Team

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