four similar cars having same mass are running at the same speed on the same speed and when breaks are applied at the same time the cars cover distance of 5m, 5.5m, 4.8 and 5.2 m. In which car the friction between the brake pads and disc is maximum
assuming no tires skid more then the one that stops in the shortest distance has the best brakes.
To determine which car has the maximum friction between the brake pads and the disc, we can use the concept of kinetic friction. Kinetic friction is the force that resists the motion between two surfaces when they are in contact and moving relative to each other.
The formula to calculate kinetic friction is:
Frictional force (F) = coefficient of kinetic friction (μ) * normal force (N)
In this scenario, since all the cars have the same mass and are running at the same speed, we can assume that the normal force (N) will be the same for all the cars. Therefore, we can focus on the coefficient of kinetic friction (μ) to determine which car has the greatest friction.
By observing the distances covered after the brakes are applied, we can see that the car which covers the least distance has the maximum friction. In this case, the car that covers a distance of 4.8m has the least distance traveled after the brakes are applied. Therefore, it experiences the maximum friction between the brake pads and the disc.
Therefore, out of the four similar cars, the car that covered a distance of 4.8m would experience the maximum friction between the brake pads and the disc.