Does friction oppose an object's motion?

Answer 1

Friction always mimics a force in a direction exactly opposite to the object's motion.

So its effect is always to rob the moving object of speed, velocity, kinetic energy,

and momentum.

Answer 2

Yes.

Try this experiment:

Slide a brick across any surface of adequate size. If the brick stops by itself, this is proof of the oppositional force of friction to a moving object.

Answer 3

This is basically described by Newton's Second Law: F=ma (force = mass x acceleration). Acceleration is the rate of change of the velocity. Solving for acceleration: a=F/m. In other words, if there is more force, there will be more acceleration; on the other hand, if an object has more mass, there will be less acceleration.

Answer 4

Friction is the force that results when two materials rub against each other. Air and water resist motion when a moving object pushes against them. Flowing water has a similar kind of force.

Answer 5

Friction provides a force, and therefore an acceleration, in the opposite direction of motion.

Answer 6

friction acts on materials that are in contact

Answer 7

it makes objects slow down because it opposes motion

Answer 8

Friction causes moving parts to generate heat, thus reducing the efficiency of the machine.