Question

10. The following table gives the data about motion of a car.
Time (h) 11.00 11.30 12.00 12.30 1.00
Distance (km) 0 30 30 65 100
Plot the graph.
(i) Find the speed of the car between 12.00 hours and 12.30 hours.
(ii) What is the average speed of the car?
(iii) Is the car's motion an example of uniform motion? Justify

Answer 1

Answer:

(i) Speed = Distance/Time

speed=30km÷1/2 hrs

speed=60km/hr

(ii)Total time taken:11:00-1:00

=3 hrs

Total distance covered:0+30+30+65+100=225 km

Average speed=total distance covered/total time taken

Average speed=225km/3hr

=75km/hr

Answer 2

Answer:

(i)2km/h

(ii)1.85

(iii) no

Explanation:

(i) S=TOTALDistance/totaltime

s=60/30

s=2m/s

(ii)a=totaldistance/totaltime

   a=220/120

   a=11/6

   a=1.85