Le he regalado a mi hijo un coche de plástico para que se entretenga lanzándolo por el suelo. Lo lanza a una velocidad de 12 m/s, y el coche tan solo es capaz de recorrer 9 metros hasta detenerse. Si el coche tiene una masa de 2kg. ¿Cuál es la fuerza de rozamiento?

16 N

Explanation:

Initial speed of a car, u = 12 m/s

Finally, it stops, v = 0

The car covers a distance of 9 meters.

The mass of a car is 9 kg

We need to find the friction force. Friction force always acts in the opposite direction to the direction of motion. It is given by :

F = ma

a is the acceleration of the car. We can find it using third equation of motion as follows :

Net force is given by :

F = ma

So, the force of friction has a magnitude of 16 N.

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.

c. newton's third law of motion