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Homework Statement
In order for a car of 4000kg to travel at 10m/s with a frictional force of 400N, find the power output of the engine.
Homework Equations
P=Fv
The Attempt at a Solution
I found
40000*10+400*10=400400W,
is this right?
Homework Statement
In order for a car of 4000kg to travel at 10m/s with a frictional force of 400N, find the power output of the engine.
Homework Equations
P=Fv
The Attempt at a Solution
I found
40000*10+400*10=400400W,
is this right?
oh. SO it's 4000N?
But what if the question did not state whether the car started from rest or with an initial velocity of 10m/s?