Question

A car will skid more on a wet road than on dry one because, between the dry road and the car tyres there is more:
(A) friction
(B) lubrication
(C) gravity
(D) heat

Answer 1

Hint:The main reason for skidding of the vehicle or any other object on the surface is due to the less friction between the contact of the two objects. If the friction is more, there is no skidding. And the different material has the different coefficient of friction.

Complete step-by-step solution:
Friction is one of the forces which lies between the two surfaces which are in contact that are trying to move or slide with each other. For example, if the object is moving in the floor and the force input is zero to the object, after some time the object will stop because of the friction. Friction is always acting opposite to the direction of the object it is moving. But, in some places friction helps to move the object. For example, the car is on the road and tries to move. If there is friction between the tyres and road, the car will move. If there is no friction between the tyres and road, the car will not move. So, friction plays a major role in moving the object.

Now, if the car is going on the dry surface, there is more friction between the road and the car tyres. Suddenly the road is in wet condition, so that the friction between the road and the car tyres is becomes less. Because the coefficient of friction is reduced. So, the friction is more in dry condition and friction is less in wet condition.
Hence, the option (A) is the correct answer.

Note:- The coefficient of friction is different for different materials. In dry conditions, there is contact between the road and car tyres but in wet conditions the contact is between the water and the car tyres. So, the friction is changed in dry and wet conditions.