Question #962dd

1 Answer
MeneerNask
Apr 27, 2016

You first convert mph into m/s.

Explanation:

The conversion rate: 1mph=0.447m//s (you can look that up)
->30mph=30xx0.447=13.411m//s

Kinetic energy E_k=1/2xxmxxv^2

E_k=1/2xx1200xx13.411^2=107916J~~108kJ

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