Question

6. A car covered the first 400 m distance with a speed of 8 m/s, the next 1200 m with a speed 12 m/s and the last 360 m with a speed of 12 m/s. Calculate the average speed of the car​

Answer 1

Answer:

9.8m/s

Explanation:

Average speed =

time taken to travel the distance

Total distance travelled

Time taken to travel the distance 400 m=400/8

=50 s

Time taken to travel the distance 1200 m= 1200/10

=120s

Time taken to travel the distance 360 m= 360/12

=30 s

Total distance travelled =400+1200+360=1960 m

Total time to travel =50+120+30=200 s

Average speed =

200

1960

=9.8 m/s