Does Friction Oppose Motion on an Inclined Surface?

In summary, friction always acts in the opposite direction to the motion of an object and seeks to equalize the relative motion between the object and the surface. In the case of an object on an inclined surface, friction will oppose the motion and accelerate the object in the same direction as the surface until they have the same speed.
  • #1
Nstraw
27
0
If we Are moving an object on an inclined surface than shouldn't friction be in the same direction?
 
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  • #2
Nstraw said:
If we Are moving an object on an inclined surface than shouldn't friction be in the same direction?
Same direction as what? The motion of the object?
 
  • #3
Nstraw said:
If we Are moving an object on an inclined surface than shouldn't friction be in the same direction?

Friction is always in the opposite direction to the direction of movement of an object.
 
  • #4
anjelin said:
Friction is always in the opposite direction to the direction of movement of an object.

Not exactly.
It opposes the RELATIVE motion the object has to say, the underlying surface.

That is:
Friction seeks to equalize the motions of the object and the surface.

Suppose you drop a brick (no horizontal velocity) onto a moving plank.
The friction from the plank will accelerate the brick in the direction of its own generated horizontal motion, until the brick moves with the same speed as the plank.
 
  • #5
So friction will oppose the motion
 
  • #6
Nstraw said:
So friction will oppose the motion

It opposes relative motion between the object and the surface.
 

Related to Does Friction Oppose Motion on an Inclined Surface?

1. What is friction on an inclined plane?

Friction on an inclined plane is the force that opposes the motion of an object as it moves along an inclined surface.

2. How is friction on an inclined plane calculated?

The force of friction on an inclined plane can be calculated using the formula F = μN, where F is the force of friction, μ is the coefficient of friction, and N is the normal force.

3. What factors can affect the amount of friction on an inclined plane?

The amount of friction on an inclined plane can be affected by the weight of the object, the angle of the inclined plane, the surface material, and the coefficient of friction between the object and the surface.

4. How does friction on an inclined plane affect the motion of an object?

Friction on an inclined plane can slow down the motion of an object, causing it to move at a slower speed or even come to a complete stop.

5. How can friction on an inclined plane be reduced?

To reduce friction on an inclined plane, one can decrease the angle of the plane, use a smoother surface material, or decrease the weight of the object. Additionally, lubricants can also be used to reduce friction on an inclined plane.

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