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The driver of a car moving on a straight road applies brakes to come to rest, with a constant retardation 'a'. Assuming that the time of motion is more than 2 s, the distance covered by the car in secondlast second of its motion is
 one year ago
 one year ago
The driver of a car moving on a straight road applies brakes to come to rest, with a constant retardation 'a'. Assuming that the time of motion is more than 2 s, the distance covered by the car in secondlast second of its motion is
 one year ago
 one year ago

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Distance Travelled in nth Second \[Dn = u + \frac{ a }{ 2 }[2n1]\] Since the Question Talks about retardation \[Dn = u  \frac{ a }{ 2 }[2n1]\]
 one year ago

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\[v = u at\] \[u = at\] t  1 = n t = n +1 u = a (n+1)
 one year ago

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Nw Substitute the Value of u in the 1st equation
 one year ago

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\[Dn = an + a  an + a/2 = 3a/2\]
 one year ago

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secondlast second of its motion
 one year ago

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let t be the total time
 one year ago

yrelhan4Best ResponseYou've already chosen the best response.0
oh.. haha.. ty again!
 one year ago
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