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Newton’s 1st law

An object will not change its motion unless acted on by an unbalanced force

Newton’s 2nd law

A net force causes acceleration, and mass resists acceleration. (F= MA A=F/M)

Newton’s 3rd law

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

How to calculate net force

• When forces act in the same direction, you add them to determine net force

• When forces act in opposite directions, you subtract the smaller force from the larger force

• The larger force wins which direction it is in.

What happens to an object when forces on it are balanced?

Balanced forces on an object will cause a change in motion on that object (moving or not moving)

What happens to an object when forces are unbalanced?

Unbalanced forces on an object create a change in motion, such as a change in speed or direction.

What is Inertia?

Inertia is an object's resistance to change in motion.

What property does inertia depend on?

The mass determines the object’s inertia. (More mass=more inertia)

How does force affect acceleration?

A net force causes acceleration

How does mass affect acceleration?

Mass resists acceleration

How does mass affect the amount of force?

the greater the mass of the object, the greater the force needed to accelerate

How does acceleration affect the amount of force?

Acceleration is directly proportional to the amount of force

What is an action force?

The force that is applied to an object.

What is a reaction force?

The force the object responds back with.

How does an elastic limit determine damage?

If you apply a force less than the material’s elastic limit, then it will remain in its original shape.

How does a breaking point determine damage?

If you apply a force more than its breaking point, then it will break.

Another note-

Force and acceleration are directly proportional, mass and acceleration are inversely proportional.