A car of mass 1000 kg has its velocity increased from 10m/s to 30m/s in 10 seconds. What is the power developed?
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s=ut+1/2at^2
a=v-u/t
a=30-10/10
a=2m/s^2
s=10*10+1/2*2*(10)^2
s=100+100
s=200m
power=work/time
work=force*displacement
work=ma*s
W=1000*2*200
W=400000Nm
power=400000/10
power=40000J/s
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