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# what am I doing wrong?

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So I had the correct answer to this question, and now I'm redoing it 10 minutes later and can't seem to get it correct even after using the equation in the textbook :S

$$m= 180 kg$$

$$g=9.8m/s^2$$

$${\mu}_{0} = 0.17$$

$$a = {0.0062m}^{-2}$$

$${x}_{2}=10$$

$${x}_{1}=0$$

The textbook gives the answer of 6kJ but it rounds

The answer I got originally was something like 5997 i think.... now I get 6644.4

vest4R  Apr 17, 2017
edited by vest4R  Apr 17, 2017
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#1
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I get the following:

Note that you need x2 in metres and that 6644 J = 6.644 kJ.

Alan  Apr 17, 2017
#2
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thanks alan for reinforcing that. It's frustrating when the textbook rounds down so far, or maybe it's an error. Either way, thank you.

vest4R  Apr 17, 2017

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