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Find velocity from Power vs position graph

3 votes
284 views

Power =(force)(velocity)
At x=0 ,
v=1 ,
P=2,
F=(10/3)a
Hence $2=(10/3)a(1)$
$a=(14/10)$
Now at x=10 , P=4
$4=(10/3)(14/10)v$
$v=2$ at x =10
But it is wrong why ?

asked Apr 6, 2017 in Physics Problems by koolman (4,116 points)
edited Apr 6, 2017 by koolman

1 Answer

1 vote

You are assuming that force and acceleration are constant. They are not constant. So acceleration at $x=10$ is not equal to that at $x=0$.

answered Apr 8, 2017 by sammy gerbil (26,096 points)
reshown Apr 10, 2017 by sammy gerbil
How can we predict that both force and acceleration is not same .
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