Question

The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
A.static friction
B.dynamic friction
C. limiting friction
D.coefficient of friction

Answer 1

it's C limiting friction which is the highest value of static friction....... it comes into play when the body just begin to slide...

Answer 2

Answer:

The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as :

Option(A): Static friction.

Explanation:

Static friction:

In Kinematics, the frictional force working between two surfaces which have no relative velocity (Vr = 0) between each other, resists the external force that is being applied to the object and trying to give motion in the object is called the static friction.

The object remains static until the force of static friction is overcome.

$Static \: Friction \\ = Normal \: Force \times Static \: Friction \: coefficient. \\ f = µ.N$

At the terminal point just before the breaking of static equilibrium [External force = Static friction force (f = µ.N)] the frictional force is maximum and neglecting the applied external force.

At which moment the object will start to move the term 'static friction' will not be valid any more.

Then 'dynamic friction' will start working there in this role.

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