Q10 of 24 Page 31

A car covers half the distance at a speed of 50 km/h and the other half at 40km/h. Find the average speed of the car.

Let the total distance covered by the car be ‘d’ km.


Time taken to cover first distance, t1




Time taken to cover second distance, t2



Total time = t1 + t2




Therefore, average speed


= 44.44 km/h


More from this chapter

All 24 →
8

Draw the distance – time graph when its speed decreases uniformly.

 9

A car travels at a velocity of 80 km/h during the first half of its running time and at 40 km/h during the other half. Find the average speed of the car.

 11

Derive the equation for uniform accelerated motion for the displacement covered in its nth second of its motion.

 12

A particle covers 10m in first 5s and 10m in next 3s. Assuming constant acceleration. Find initial speed, acceleration and distance covered in next 2s.