Assertion : The value of dynamic friction is less than the limiting friction.
Reason : Once the motion has started, the inertia of rest has been overcome.

(A) : The magnitude of dynamic friction is less than the limiting friction. (R ): Once the motion has started, the inertia of rest has been overcome.

"The dynamic friction is a little less than the limiting friction ". Why ?

Limiting (i.e., maximum) static friction is slightly less than sliding friction.

Assertion : Angle of repose is equal to angle of limiting friction. Reason : When the body is just at the point of motion, the force of friction in this stage is called as limiting friction.

Assertion : Angle of repose is equal to angle of limiting friction. Reason : When the body is just at the point of motion, the force of friction in this stage is called as limiting friction.

Assertion : Angle of repose is equal to angle of limiting friction. Reason : When the body is just at the point of motion, the force of friction in this stage is called as limiting friction.