Physics
Physi Video Notes
cs Video Notes
Friction
Class 11ᵗʰ
, Didn’t understand? Watch
Friction the video (Click Here)
Friction is a resistive force that opposes the relative motion or the tendency of
such motion between two surfaces in contact.
It acts tangentially to the surfaces and depends on the nature of the surfaces and
the normal force pressing them together.
It is a self-adjusting force, it can adjust its magnitude to any
value between zero and the limiting (maximum) value
i.e 0 ≤ f ≤ fmax
Types Of Friction
Static Friction Kinetic Friction Rolling Friction
Didn’t understand? Watch
Static Friction the video (Click Here)
Acts when there is no relative motion between the two surfaces.
Prevents the initiation of motion.
It has a maximum value given by: fₛ ≤ μₛN
Where, μₛ is the coefficient of static friction, and N is the normal force.
Kinetic Friction
Acts when the surfaces are in relative motion (the body is sliding over a
surface).
Physi Video Notes
cs Video Notes
Friction
Class 11ᵗʰ
, Didn’t understand? Watch
Friction the video (Click Here)
Friction is a resistive force that opposes the relative motion or the tendency of
such motion between two surfaces in contact.
It acts tangentially to the surfaces and depends on the nature of the surfaces and
the normal force pressing them together.
It is a self-adjusting force, it can adjust its magnitude to any
value between zero and the limiting (maximum) value
i.e 0 ≤ f ≤ fmax
Types Of Friction
Static Friction Kinetic Friction Rolling Friction
Didn’t understand? Watch
Static Friction the video (Click Here)
Acts when there is no relative motion between the two surfaces.
Prevents the initiation of motion.
It has a maximum value given by: fₛ ≤ μₛN
Where, μₛ is the coefficient of static friction, and N is the normal force.
Kinetic Friction
Acts when the surfaces are in relative motion (the body is sliding over a
surface).
