Question

a car with a mass of 900 kg accelerates along the road at 3m/s². a frictional force of 600 n is acting on the wheels. what force is produced by the car's engine?

Answer 1

Let's first find the net force of the car from the Newton's Second Law of Motion:

$$F_{net}=ma=900\ kg\cdot3\ \dfrac{m}{s^2}=2700\ N.$$

Then, we can find the force produced by the car's engine:

$$F_{engine}=F_{net}-F_{fr}=2700\ N-600\ N=2100\ N.$$