a vehicle weighs 120 kg wt brakes are applied so that the vehicle stops rolling and starts skidding find the force of friction if the coefficient of friction is 0.4
To find the force of friction, we can use the formula:
Force of friction = coefficient of friction * normal force
The normal force is the force exerted by a surface to support the weight of an object resting on it. In this case, since the vehicle is stopped from rolling and starts skidding, the normal force is equal to the weight of the vehicle.
The weight of the vehicle is given as 120 kg wt, which needs to be converted into Newtons (N) since the standard unit for weight in physics is Newtons. We can do this by multiplying the weight in kg by the acceleration due to gravity (9.8 m/s^2):
Weight (in N) = Mass * Acceleration due to gravity
= 120 kg * 9.8 m/s^2
= 1176 N
Now that we have the weight in Newtons, we can calculate the force of friction:
Force of friction = coefficient of friction * normal force
= 0.4 * 1176 N
= 470.4 N
Therefore, the force of friction is 470.4 N.