Describing Forces and Motion

An object is in motion if it changes position relative to a reference point.

A reference point is what appears to be remaining still compared to the object you are observing.

Motion can be described by distance, speed, displacement, and velocity, where displacement and velocity also include direction.

you explain it with a magnitude and a direction.

This is known as a vector quantity.

In science acceleration refers to increase speed, decreasing speed, or changing direction.

Acceleration = Change in Velocity /Change in time.

Forces cause things to move!

Like acceleration, a force is described by its magnitude and its direction. It is a vector quantity.

This represents the magnitude of the force.

(A kilogram is equal to about 2 pounds.)

When forces are NOT balanced an object moves.

This means no acceleration!

​NO MOVEMENT!

The magnitude of the force is represented by the size of the arrows!

This is the combinations of all the forces acting on an object.

* If the arrows point the same direction you add the forces.

* If the arrows point the opposite directions you subtract!

What would the "NET FORCE" be for this force drawing?