Science - Physics

• o   Newton’s 1st Law of Motion – A body will remain at rest or in uniform motion unless acted upon by a net external force
• o   Body – an object with mass that is being observed
• o   Rest – a state of motion in which the object is not moving relative to the observer
• o   Uniform Velocity – Constant velocity, this means constant unchanging speed and constant unchanging direction
• o   Force – a push or pull exerted by an object
• o   Net external force – the sum of all the forces acting on a body
• o   Newton’s 2nd Law of Motion – Force equals to mass times acceleration (F=ma)
• o   Newton’s 3rd Law of Motion – For every action there is an equal and opposite reaction
• o   Scalar quantities – has magnitude but no direction, examples are temperature, energy, distance, time, weight
• o   Vector quantities – has magnitude and direction, examples are displacement, force, mass, acceleration