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Mathematics: Post your doubts here!

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upload_2014-5-13_22-46-0.png

I am getting a=4
everything else is correct... the whole question is correct except for this stupid little thing...

I had an equation from P(-1/2) => a=-2b-2

got the correct value for b when I put this value of a in the other equation but when i put b=-3 in this to find a after that ... i get 4 instead of -4!! >__<
 
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View attachment 42421

I am getting a=4
everything else is correct... the whole question is correct except for this stupid little thing...

I had an equation from P(-1/2) => a=-2b-2

got the correct value for b when I put this value of a in the other equation but when i put b=-3 in this to find a after that ... i get 4 instead of -4!! >__<
heres the mistake
the eq will be a=2b+2
 
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Hey can someone please help with this mechanics question?

attachment.php

A car with mass 1100kg drives a distance 1760 m from A to B. Find the Increase in Kinetic Energy in terms of velocity V, and find the increase in P.E at distance x where 0<=x<=1760. Then find Kwhere KV^2=x.
 
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