Question

by refering to the norml force explain why the friction between an object and a surface is less when the surface is tilted than when the same surface is horizontal​

Answer 1

Explanation:

If the surface is horizontal,the normal force is equal to mg

and if it is tilted then normal force is equal to the component of mg, which is always less than mg.

Friction depends on normal force, lesser the normal force lesser is the friction.

Answer 2

Friction is a contact force that resists sliding between surfaces. The magnitude of friction depends on two factors: the normal force and the coefficient of friction. The normal force is the force that surfaces exert to prevent solid objects from passing through each other, and it is perpendicular to the contact surface. The coefficient of friction is a number that describes the roughness between two surfaces, and it is usually between 0 and 1.

When a surface is tilted, the normal force on an object decreases because it is no longer equal to the weight of the object, but rather a component of it. The normal force is equal to the weight of the object times the cosine of the angle of inclination. As the angle increases, the cosine decreases, and so does the normal force. Since friction is proportional to the normal force, it also decreases when the surface is tilted.

Therefore, the friction between an object and a surface is less when the surface is tilted than when the same surface is horizontal because the normal force on the object is reduced by the tilt.

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