how to solve this? can some one help me out
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Summarizing your question,The body's Initial velocity is 30 km/h and after 4 seconds it is 37.2 km/h.Then Acceleration = V-U/T => 37.2 - 30 / 4 =1.8 m/s^2.To verify the answer we have to take the first statement i.e. "after 2 seconds it is 33.6 km/h"so 1.8 m/s^2 × 2 = 3.6 m/s which adds upto 33.6 km /h and so the acceleration is uniform.And the acceleration is 1.8m/s^2.
Summarizing your question,The body's Initial velocity is 30 km/h and after 4 seconds it is 37.2 km/h.Then Acceleration = V-U/T => 37.2 - 30 / 4 =1.8 m/s^2.To verify the answer we have to take the first statement i.e. "after 2 seconds it is 33.6 km/h"so 1.8 m/s^2 × 2 = 3.6 m/s which adds upto 33.6 km /h and so the acceleration is uniform.And the acceleration is 1.8m/s^2.
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