How much work is required to stop a 1000 kg car traveling at 100 km/hr?(adsbygoogle = window.adsbygoogle || []).push({});

I was going to use KE=1/2mv^2 , since the work should equal the KE, assuming no friction.

I have: =1/2(1000 kg)(100km/hr)^2

I was using dimensional analysis to make the conversion to m/s, so I end up with J, but I think I'm doing something wrong in the conversion.

(1000 km/hr)(1000 m/1 km)(3600 sec/1 hr)

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# Homework Help: Work & KE

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