Newton's Laws

non equilibrium situation

the forces acting on the object are not balanced, meaning that the sum of the forces is not equal to zero.

Free Body Diagrams

depict forces acting on an object using arrows

gravitational force

keeps the earth and other planets in orbit around the Sun.

F=ma

Equation for acceleration (Newton’s Second Law)

normal force

The ________ is perpendicular to the surface and acts to support the weight of the object.

equilibrium situation

the forces acting on the object are balanced, meaning that the sum of the forces is equal to zero.

normal force

contact force perpendicular to the surfaces in contact

Newton's 1st Law (Principle of Inertia)

An object at rest stays at rest, and an object in motion stays in motion with a constant velocity unless acted upon by an external force

Newton's 2nd Law

The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass

Newton's 3rd Law

For every action, there is an equal and opposite reaction

Types of friction

sliding friction and rolling friction