Forces and Friction Reg

What are Newton’s three laws of motion?

1. Law of Inertia

2. An unbalanced force on an object will accelerate the object

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

What are the two components of Newton’s Law of Inertia?

1. An object at rest tends to stay at rest

2. An object in motion tends to stay in motion UNLESS it is acted upon by an unbalanced force

What is an objects Inertia associated with?

Its MASS

What is a force?

A force is a push or pull on an object resulting from the object’s interaction with another object

What are contact forces?

Forces in which the two objects are physically contacting each other

What are Action-at-a-distance forces?

Forces in which the two interacting objects are not in physical contact, but are able to exert a push/pull

What are balanced forces?

When all the forces acting upon an object balance each other, the object will be at EQUILIBRIUM. This means the object DOES NOT ACCELERATE.

What is Normal Force?

The force exerted upwards, usually by objects like tables.

What are unbalanced forces?

Forces that cause acceleration

What are the two factors that acceleration can depend on in Unbalanced Forces?

Acceleration can either directly depend on the “net force” or inversely depend on the object’s mass

What is the Net Force?

The Net Force acting on an object is the VECTOR SUM of all forces acting on the object

What is Newton’s Second Law of Motion?

Direction of the object is positive

What is Newton’s Third Law of Motion?

For every action there is an equal and opposite reaction

What is gravitational force equal to?

Weight