Question

using the data answer the questions.
plot the graph
1.find the speed of the car between 12.00 hours and 12.30 hours.
2.wjat is the average speed of the car.
3.is the cars motion an example of uniform motion. justify

Answer 1

(1) 70km/h speed
(2) 50km/h average speed
(3) no it's not a uniform motion bcz car is changing it's speed between 12 to 12:30 .

Answer 2

1 //////

Speed of the car =distance travelled/time taken

between 12.00 to 12.30

distance=65-30=35km

time =30minutes=1/2hour.

speed =35/(1/2)=35×2=70kmph

or we can say,the car travels 35km in half hour,it will travel 70 km in 1 hour ,so speed =70kmph.

2////////

average speed =total distance travelled/total

Total distance=100km

Total time =2hours

Average speed=100/2=50kmph

3///////

In uniform motion ,the speed of car must be constant in whole journey.

But we can see it has different speeds at different times.

So it is not an Example of uniform motion.