An engine of car of power 40KW moves on a rough road wit a velocity of 50ms-1.cal.the force require to bring it to rest.
F*V = 40,000 W.
F*50 = 40,000, F = 800 N.
To calculate the force required to bring the car to rest, we can use the equation:
Force = Mass × Acceleration
To find the mass of the car, we need to know the relationship between power, velocity, and force.
Power is the rate at which work is done or energy is transferred. It is given by the equation:
Power = Force × Velocity
We can rearrange this equation to solve for force:
Force = Power / Velocity
Now we have the equation needed to find the force required to bring the car to rest.
First, let's convert the power from kilowatts (KW) to watts (W).
1 KW = 1000 W
So, the power of the engine is:
40 KW = 40,000 W
Now we can plug the values into the equation to find the force required:
Force = 40,000 W / 50 m/s
Calculating this:
Force = 800 N
Therefore, the force required to bring the car to rest is 800 Newtons.