Final answer:
The force of friction acting on a car with a mass of 100 kg on a road with a coefficient of friction of 0.3 is 294 N.
Step-by-step explanation:
The force of friction acting on a car with a mass of 100 kg on a road with a coefficient of friction, μ, equal to 0.3, can be calculated using the formula Ffriction = μ * N, where N is the normal force (in this case, N equals the weight of the car).
Since the car's weight is the product of its mass (m) and the acceleration due to gravity (g) which is approximately 9.8 m/s², the normal force N can be found by N = m * g = 100 kg * 9.8 m/s². With the values provided, the force of friction that acts on the car is Ffriction = 0.3 * 980 N, which results in Ffriction = 294 N.