question_answer

  The figure above shows a velocity-time graph of two cars A and B, which start from the same place and move along a straight road in the same direction. (i) What is the acceleration of car A? (ii) What is the acceleration of car B between 2s to 4s?

Answer:

(i) From the given graph, Acceleration of car\[A=\frac{80m{{s}^{-1}}}{8}=10m{{s}^{-2}}\] (ii) From the given graph Acceleration of car B between 2s to 4s is \[=\frac{(60-20)m{{s}^{-1}}}{2s}=20m{{s}^{-2}}\] The acceleration of a car started at t - 0