Forces and Motion Review

Forces can be categorized as:

1) Contact Forces

2) Non Contact Forces

A type of force that happens between two objects that come in contact with one another.

Friction is an opposing force. It acts in the opposite direction of motion.

You must overcome friction to make stationary items move.

The amount of friction force acting on an object depends on the weight of the object and the roughness of the surface that the object is in contact with.

When the forces acting on an object are equal, they are called balanced forces. Balanced forces cancel each other out.

When the forces acting on an object are not equal, the forces are unbalanced. Unbalanced forces put things in motion.

It is the sum of all forces acting on an object.

Three laws that describe how forces interact with objects and cause motion

Objects at rest, remain at rest. Unless acted upon by an outside force.

Objects in motion, remain in motion. Unless acted upon by an outside force.

The acceleration of an object depends on the net forces acting on the object and (inversely on) the mass of the object.

F = M x A

(force) = (mass) x (acceleration)

In simple term: to move a mass, you need a force.

More force=More acceleration

or we can say,

The more massive an object is the more force is needed to make the object accelerate.

For every action, there is an equal and opposite reaction.