A car of mass 200kg is moving with a certain velocity. It is brought to rest by the application of brakes, within a distance of 20m when the average resistance being offered to it is 500N. What was the velocity of the motor car?
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F=ma
500=200*a
a=2.5
now
v^2=u^2 +2as
0=u^2-2*2.5*20
u^2=100
u=10m/s
500=200*a
a=2.5
now
v^2=u^2 +2as
0=u^2-2*2.5*20
u^2=100
u=10m/s
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