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1) A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement x is proportional to:

(a) x²

(b) e^x

(d) logx

#Physics #Mechanics

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JOHNCENA IS BACK ·2009-04-22 05:46:33

(a)

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Anirudh Narayanan ·2009-04-22 05:47:56

correct, cena

explanation please

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JOHNCENA IS BACK ·2009-04-22 05:51:51

W=K(f)-K(i)=loss in kinetic energy= âˆ«kxdx={kx²/2}

[since force =kx (given),where k is proportionality constant]

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JOHNCENA IS BACK ·2009-04-22 06:06:03

so,loss in KE=kx²/2

since k/2 is constant so

loss in KE is directly proportional to x²

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