Please solve question no 4:
4. At a certain instant, an auto driver is driving at a speed of 30 km h-1. Then, he uniformly accelerates the auto
and after 2.5 minutes, the speed of his auto becomes 60 km h-1. What is the average speed of the auto? What is
the value of uniform acceleration during the given interval of time?
4. At a certain instant, an auto driver is driving at a speed of 30 km h-1. Then, he uniformly accelerates the auto
and after 2.5 minutes, the speed of his auto becomes 60 km h-1. What is the average speed of the auto? What is
the value of uniform acceleration during the given interval of time?
Hello Das, initial velocity = 30 * 5/18 m/s
Final velocity = 60 * 5/18 m/s
So change in velocity = 30 * 5/18 m/s
Time taken = 2.5 min = 2.5 * 60 s = 25 * 6 s = 150 s
Hence acceleration (uniform) = change in velocity /time taken
==> 30 * 5/18 * 1/150 = 1/18 m/s^2
As acceleration is uniform average velocity = u + v / 2 = 90/2 = 45 km p h
Final velocity = 60 * 5/18 m/s
So change in velocity = 30 * 5/18 m/s
Time taken = 2.5 min = 2.5 * 60 s = 25 * 6 s = 150 s
Hence acceleration (uniform) = change in velocity /time taken
==> 30 * 5/18 * 1/150 = 1/18 m/s^2
As acceleration is uniform average velocity = u + v / 2 = 90/2 = 45 km p h