Answers

2016-02-25T19:37:41+05:30
Mass =2000kg

let, V1=18KH/H=5M/S
V2=19KM/H=5.27M/S


We know E.k is ½ MV²

E.K IN 1 CASE = ½MV1²
= ½*2000*5
= 5000 J


E.K IN 2 CASE= ½MV2²
= ½*2000*5.27
=5270 J
WORK DONE TO increase ITS VELOCITY=CHANGE IN E.k

= V2-V1
= 5270-5000
= 270 J SHOULD BE THE WORK DONW



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