A car accelerates from rest at constant rate of 2 m/s^2 for some time. Immediately after this, it retards at a constant rate of 4 m/s^2 and comes to rest. The total time for which it remains in motion is 3 s. Taking the moment of start of motion as t=0, answer the following questions (71. to 75.) . Please experts kindly answer all the questions, don't ask to post questions in a thread.
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firstly you take 4metre per second square acceleration you have to be tell that question the car start at the rest means u is equal to zero B you have to find v and t is equal to 3 second put the value on formula a=v-u ÷t
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