A pesson is driving a car in a straight line with an initial velocity of 4 m/sec and an accelenation of 0.2 m/s².
After 2 minutes he applied brakes and car stopped after travelling 7 meters.
Find out the acceleration during brake?
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Explanation:
take out value of final velocity after 2 min
a=v-u/t
v=28 m/s
after brakes are applied final velocity will become initial as the final velocity would be zero because at the end the car would obviously come to rest
according to formula
2as=v²-u²
s=7 m given
v =0
u=28
acceleration= -56m/s
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