The measure of the amount of force needed to move an object in a certain direction is called friction.

Here's why:

* Friction is a force that opposes motion between two surfaces in contact. It directly affects how much force is needed to start or continue moving an object.

* The direction of friction is always opposite to the direction of motion or the intended motion.

Other related terms:

* Force: A push or pull that can cause a change in motion.

* Normal Force: The force exerted by a surface on an object that is perpendicular to the surface.

* Coefficient of Friction: A dimensionless number that describes the ratio of the force of friction to the normal force.

Let me know if you have any other questions!