Physics 2022 JAMB Past Questions - Question 22: When the brakes in a car are applied, the frictional force on the tyres

Correct Answer

D

Explanation

When the brakes in a car are applied, the frictional force on the tires increases, which helps to slow down the car. This frictional force is what allows the tires to grip the road and prevent the car from skidding.
When the brakes in a car are applied, the frictional force on the tires increases. The primary purpose of braking systems in cars is to slow down or bring the vehicle to a stop by converting the kinetic energy of the moving car into heat through friction.

When you press the brake pedal, the brake system applies force to the brake components (such as brake pads or shoes) that come into contact with the rotating surfaces of the wheels (brake discs or drums). This contact generates friction between the brake components and the wheel surfaces.

According to Newton's laws of motion, the frictional force between the brake components and the wheels acts in the opposite direction to the motion of the wheels. This force slows down the rotation of the wheels, and since the wheels are connected to the car's axles, the entire vehicle decelerates.

It's essential to note that the amount of frictional force generated during braking depends on various factors, including the condition of the braking system, the type of brake components, the road surface, and the weight of the vehicle. Proper maintenance of the braking system is crucial for ensuring effective and safe braking performance.