ICSE Class 10 Answered
a truck weighing 1000kgf changes its speed from 36km/h to 72 km/h in 2 minutes. calculate(a) the work done by the engine& (b)its power
(g=10 m/s-2)
Asked by pri | 13 Mar, 2012, 06:43: PM
Expert Answer
w=1000 kgf (it is the force exerted by 1000kg mass)
Therefore, m=1000 kg
u=36 km/h=10 m/s
v=72km/h=20m/s
t=2 min=120 s
We know, Work done, W=F.s
F=ma=
Answered by | 14 Mar, 2012, 11:39: AM
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