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2015-02-12T23:25:44+05:30

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BY WORK ENERGY THEOREM
WORK DONE IN STOPING  = CHANGE IN KINETIC ENERGY =  \frac{1}{2} m v^{2}
                                                                    
=  \frac{1}{2}*1500 (60* \frac{5}{18} )^{2}

=208333.333 Joule
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2015-02-17T17:06:00+05:30
From work energy theorem,
Work done = - (change in kinetic energy)
change in KE = 0 - (1/2 * 1500 * (50 /3)^2)  50/3 = conversion of 60 km/hr to m/s
= -20833.33 J
Thus work done is 20833.33 J.
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