The "force" of friction is always exactly opposite the direction of motion.
By definition, friction is opposite of the direction of motion.
The direction of friction is opposite to the direction of motion. This means that when an object is moving in one direction, the friction force is acting in the opposite direction, trying to slow down or stop the object.
It is in most cases opposite to the direction of motion.
The direction of the force of friction is such that it opposes the direction of motion that an object would move if there were no frictional force acting on the object.
Rubber will have a high coefficient of friction on most surfaces, but we cannot know whether there is more or less friction unless we have something to compare it to.
To compare the direction of your partner's force with your own, you can use vector addition. If the forces are in the same direction, you add their magnitudes to get the combined force. If they are in opposite directions, you subtract the magnitudes. If the forces are at an angle to each other, you can use trigonometry to determine the resultant force direction.
The three types of friction are static friction, kinetic friction, and rolling friction. Static friction occurs when an object is at rest and prevents it from moving. Kinetic friction happens when an object is already in motion and resists its movement. Rolling friction occurs when an object rolls over a surface and experiences resistance due to deformation.
All stars can be used to tell which direction you are travelling in as the movement of the earth is in a consistant direction, allowing you to compare your movement with the direction that the stars are travelling in.
Metric System
By looking at the isobars.
Velocity is a vectorial quantity, speed with a direction.
The coefficient of static friction is always larger because it takes more initial force to move an object that is at rest.