Question

B
A car travels 100 km with a speed of 50km/h another 200 km with a speed pf 20 km/h. Find the average speed?
Is this motion uniform?
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Answer 1

Explanation:

As the speed does not remain constant throughout the journey, the motion is not uniform. <br> From relation

<br> t = d/v <br> The journey of the car can be considered in two parts. <br> In the first part of journey, <br> distance

= 100 km, speed

<br>

<br> In the second part of journey, <br> distance

= 200 km, speed

<br> Time taken

<br> Total distance travelled

<br> = 100 km + 200 km = 300 km <br> Total time of travel

<br> = 2 h + 10 h = 12 h <br> Average speed

<br>