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#1
06-28-2009, 04:23 PM
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 Any help calculating work? I'm a little stumped.? A certain amount of work W is required to accelerate a motorcycle from rest to a speed v. How much work is required to accelerate the same motorcycle from rest up to a speed v/3?  |
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#2
06-29-2009, 07:51 PM
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 Re: Any help calculating work? I'm a little stumped.? If my high school physics is correct, then: F = m x a W = Fxd a = v/t = dd/dt / t W = mad=md(v/t) W'= md(v/3) /t = mdv/3t difference of W-W' = 1mdv/t - 1/3 (mdv/t) =2/3 mdv/t so it takes one third the work "W" to accelerate to 1/3 speed "v" Last edited by danfive; 06-29-2009 at 07:55 PM. |
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