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Unformatted text preview: M travelling through a Fuid is proportional to the cube of the velocity: F =K v 3 , where K is a constant. ind the velocity as a function of time, assuming that the initial velocity is v at time t =0. Neglect gravity. 4. A chain with length b and uniform mass density is tightly coiled up on the Foor. One end of the chain is lifted straight up at a rate such that the height of that end above the Foor is given by x = K t 3 , where K is a constant. (a) [4 pts] ind the total force on the chain as a funtion of time t . (b) [4 pts] ind the height of the center of mass of the entire chain as a function of time t . (c) [4 pts] ind the work done by the hand as a function of time t ....
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 Spring '08
 B.Pope
 mechanics, Force, Mass

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