Topic 3 Review

A combination of all the forces acting on an object

• distance

• Net Force

• Motion

Two forces acting on an object are unequal in strength. These could be in same or opposite directions.

• Balanced force

• Unbalanced Force

• Reaction Force

An average of the total distance divided by total time

• Average speed

• Acceleration 

• Instantaneous speed

What is this:

One object pushes or pulls another object.

• Force

• Motion

• Direction

Distance an object moves per unit time

• Speed

• Unit

• Instantaneous speed

The speed at which an object travels in a given direction

• Velocity

• Net force

• Gravity

The rate at which velocity changes. A change in velocity can involve a change in speed(increase or decrease), direction, or both.

• Acceleration

• deceleration

• Mass

the force of gravity acts between all objects in the universe that have mass , so any two objects in the universe that have mass attract each other

• Universal gravitation law

• Frictional law 

• Attraction law 

an object at rest will remain at rest unless acted upon by a nonzero net force

• Force

• Newton’s 1st law

• Balanced force

A resistance to change in motion

• Newton’s 2nd law

• Acceleration

• Inertia