# Friction always opposes motion

Statement 2: Friction always opposes motion. A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Done clear. B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Done clear. C) The direction of friction is always opposite to the direction of relative motion of two bodies in contact.For example :in rolling motion of sphere the relative motion of the sphere (at the point of... Consider a block at rest on a rough horizontal surface. A force P acts to the right on the block, with the magnitude of P being increased gradually. From what we have seen in lecture, the friction force f acting on the block as a result of the application of the force P will behave as follows:. The direction of f will always oppose the motion/impending motion of the block.

Systems with Friction) In this section we introduce friction onto the spring mass system from the last section. To model friction, we realize that the force of friction always opposes the direction of motion. In other words, if an object is moving to the right, it will experience a frictional force …

Kinetic friction occurs when there is "rubbing" between two surfaces. This type of friction always opposes the direction of motion. So for example, if a crate is sliding on the floor in the left direction, the kinetic friction between the crate and floor acts to the right. Imagine, for example, trying to slide a heavy crate across a concrete floor—you may push harder and harder on the crate and not move it at all. This means that the static fricti Friction always opposes the motion or attempted motion. The coefficient of static friction between two surfaces is 0.25. What force must be used to move a 345 lb crate on a horizontal surface? 1380 lb: 230 N: 86 lb: 344 N: A force of 250 N is used to keep a 65 kg crate sliding across the warehouse floor. What is the coefficient of sliding Not always, friction can go the same direction of motion in this example: two cube (1st in the bottom and 2 nd in the top) stacked on top of each other. We push the cube in the bottom so both cube goes in the +x direction. The friction for the cube at the bottom is in the -x direction but the friction on the second cube should go to the x+ The force of friction opposes motion when one surface slides, or tries to slide, over another. You feel friction as you drag your hand across a table. Friction is produced by forces between the molecules in the surfaces. Drag is the friction between a solid object and the fluid it is traveling through.