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A particle is moving in a straight line with initial velocity `u` and uniform acceleration `f`. If the sum of the distances travelled in `t^(th) and (t + 1)^(th)` seconds is `100 cm`, then its velocity after `t` seconds, in `cm//s`, is.A. 20B. 30C. 80D. 50 |
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Answer» Correct Answer - D `s_(t)=u+(t)/(2)(2t-1),s_(t+1)=u+(t)/(2)(2t+1)` `s_(t)+s_(t+1)=100,v=u+ft` |
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