Does friction always oppose the motion?

Assertion: Frictional force is the component of contact force parallel to the surface. Reason: Friction force always opposes the motion of a body.

Assertion : The force of tension on a body always act away from the body. Reason: Friction force always opposes the motion of a body.

Viscous force is somewhat like friction as it opposes the motion and is non-conservative but not exactly so because

In the figure shown, force of friction on A from B will always be right wards Friction always opposes the relative motion between two bodies in contact.

STATEMENT -1 : Friction always opposes motion . STATEMENT - 2 : Lesser the friction on a surface it is easier to walk on it. STATEMENT -3 : Soles of shoes gets flat due to friction .

Statement 1: While drawing a line on a paper by pencil, friction force acts on paper in the same direction along which line is drawn on the paper. Statement 2: Friction always opposes motion.

A : In the presence of air resistance, if the ball is thrown vertically upwards then time of ascent is less than the time of descent. R : Force due to air friction always acts opposite to the motion of the body.

An elevator that can carry a maximum load of 1500 kg (elvator+ passengers) is moving up with a constant speed of 2 ms^(-1). The frictional force opposing the motion is 3000 N. Find the minmum power delvered by the motor to the elevator in watts as well as in horse power (g=10ms^(-2))

A : Work done by friction can increase the kinetic energy of the body. R : Friction is a type of contact force and it always opposes the relative motion or tendency of relative motion.