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CBSE Class 11-science Answered

find out the work done by a force,which increases the velocity of 20kg mass from 12m/s to 90km/h in 10seconds.
Asked by | 03 Mar, 2013, 05:59: PM
Expert Answer
acceleration: a = ((90*5/18)-12)/10 = 1.3 m/s2
thus force, F = ma = 26 N
distanc travelled : S= (625-144)/2*1.3 = 185 J
Answered by | 03 Mar, 2013, 08:29: PM

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