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25 Nov 2009 10:20:57 IST

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The position vector of a particle varies with time as vector r = r0 vector (1-at) where r0 is a con

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The position vector of a particle varies with time as vector r = r0 vector (1-at) where r0 is a constant vector and "a" is a positive constant . The distance travelled by the particle in a time interval in which particle returns to its initial position is (Kr0 / 16 a). Determine the value of K? (Ans = 8)

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VARUN RAJ

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Joined: 16 Mar 2008

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25 Nov 2009 11:16:56 IST

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simple sum unnecessaruy complexed by the presence of kr/16lets find the vel at time t which is equl to -radistance can be found by by finding the speed so the speed is actually the magnitude of vel and here the magnitude is also ra (only sign is changing)now the time at which position is same is t=1/anow distance travelled wiill be v*t (herev refers to speed ) and the answer comes

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