If the external net force on an object is zero, the object will remain at rest or continue to move at a constant velocity. (Objects in motion tend to stay in motion and objects in rest tend to stay at rest, unless acted on but an outside force)
Newton's Second Law
If the net force on an object is not zero, the object will accelerate in the direction of the net force. The magnitude of the accelerate is directly proportional to the magnitude of the net force and inversely proportional to the object's mass.
Newton's Third Law
For every action force, there is an equal in magnitude and opposite in direction reaction force.
Mass vs. Weight
Mass is amount of matter in an object, whereas, weight is the gravitational force acting on an object.
Coefficient of Kinetic Friction vs. Coefficient of Static Friction
The value of Uk is normally smaller than Us because the bumps and grooves of the surfaces stick together during static Friction, making the initial force to move the object greater than when the surfaces are just gliding across each other.