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#1 2007-03-09 06:33:56

bugman
Member
Registered: 2007-03-09
Posts: 6

math help

The speed  of a 4kg object is given by v=(2t) m/s, where t is in seconds.  At what rate is the resultant force on this object during work at t=1 second?

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#2 2007-03-09 06:50:05

Stanley_Marsh
Member
Registered: 2006-12-13
Posts: 345

Re: math help

Okay ,

  a is the acceleration , then apply the Newton's law ,
Thus you get your answer

Last edited by Stanley_Marsh (2007-03-09 06:51:46)


Numbers are the essence of the Universe

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#3 2007-03-09 07:15:41

bugman
Member
Registered: 2007-03-09
Posts: 6

Re: math help

how do i get v???

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#4 2007-03-09 10:21:28

Stanley_Marsh
Member
Registered: 2006-12-13
Posts: 345

Re: math help

you don't  need to get v , you know that v/t=a , from the v=2t , divide both sides by t, you get  v/t=2 , thus a=2 , that's it


Numbers are the essence of the Universe

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