Question

a sprinter completes its 100 metre race in 12s .Find its average speed?

Answer 1

Answer :

A sprinter completes 100m race in 12s.

We have to find average speed of sprinter$.$

◈ What is speed ?

Speed is defined as the ratio of distance travelled to the time taken.

It's a scalar quantity having only magnitude$.$

SI unit : m/s

Let's calculate ☃

➝ Speed = Distance/Time

➝ Speed = 100/12

➝ Speed = 8.33 m/s

Answer 2

Given ,

Total distance = 100 m

Total time (t) = 12 sec

We know that , the ratio of total distance to the total time is called average speed

$\boxed{ \sf{Average \: speed = \frac{Total \: distance}{Total \: time} } }$

Thus ,

Average speed = 100/12

Average speed = 8.33 m/s

Therefore ,

• The average speed is 8.33 m/s