Answer :

Final answer:

It is true that if the wheels are skidding when braking, you cannot control the vehicle. This lack of control is due to the shift from stronger static friction to weaker kinetic friction, which provides less grip and hence less control over the vehicle.

Explanation:

If the wheels are skidding when braking, it is true that you cannot control the vehicle. This is because when wheels skid, the type of friction involved changes from static to kinetic. Static friction operates when the wheels are rolling without slipping and allows the driver to maintain control of the vehicle. Kinetic friction, on the other hand, is weaker and occurs when the wheels are sliding or skidding; it results in less control over the vehicle.

Friction and Car Motion

In a front-wheel-driven car:

(a) The friction at the rear wheel is in the direction of motion when the car is accelerating or moving forward.

(b) The friction at the front wheel is in the opposite direction of motion when the car is braking and the wheels are trying to stop while the car is still moving forward.

When sudden brakes are applied and the wheels begin to skid, static friction is overcome, and kinetic friction takes over. As a result, control over the vehicle is compromised, and the car may move a greater distance before coming to a stop due to the weaker kinetic friction.

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Rewritten by : Jeany