CBSE Class 11-science Answered

The initial speed is given in the question, the reaction time is the time taken by the driver to reduce his speed.

Don't forget to change speed from km/h to m/s before solving the question.

(i)Take u = 54km/h,  t = 0.2s, a= -6.0m/s2

Find v to get braking distance.

Use this v as the initial velocity to find total stopping distance, but now use a = 0

so u = v obtained in (i), v = 0, then find b

use equations of motion to solve for a and b

In the same way  solve for second driver.

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