Statement I: The coefficient of friction can be greater than unity. Statement II: The force of friction is dependent on normal reaction and the ration of force of friction and normal reaction cannot exceed unity.
Assertion : The forces of friction arise due ot gravitational attraction. Reason : The gravitational forces can be attractive and repulsive.
Work done by the force of friction
In Ques 1 the force of dynamic friction is.
The force of limiting friction between a body and the surface of contact is 5N A force of 7N is applied on the body and the actual motion starts The effective force of friction now is .
A force barF=hati+4hatj acts on block shown. The force of friction acting on the block is :
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.
