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# Forces, Energy & Mot

### science vocab- Physics

motion an objects change in position relative to a reference point
speed the distance traveled divided by the time interval during which the motion occurred
velocity the speed of an object in a particular direction
acceleration the rate at which velocity changes over time; an object accelerates if its speed, direction, or both changes
force a push or a pull exerted on an object in order to change the motion of the object; force has size and direction
newton the SI unit for force
net force the combination of all of the forces acting on an object
friction a force that opposes motion between objects that is due to their masses
gravity a force of attraction between objects that is due to their masses
Terminal Velocity the constant velocity of a falling object when the force of air resistance in equal in magnitude an opposite in direction to the force of gravity
Free Fall the motion a body when only the force of gravity is acting on the body
Projectile Motion the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth
Inertia the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts on the objects
Energy the capacity to do work
Kinetic Energy the energy of an object that is due to the object’s motion
Potential Energy the energy that an object has because of the position, shape, or condition of the object
Mechanical Energy the amount of work an object can do because of the object’s kinetic and potential energies
Energy Conservation a change from one form of energy to another
Law of Conservation the law that states that energy cannot be created or destroyed but can be changed from one form to another
Nonrenewable Resource a resource that forms at a rate that is much slower than the rate at which it is consumed
Fossil Fuel a nonrenewable energy resource formed from the remains of organisms that lived long ago
Renewable Resource a natural resource that can be replaced at the same rate at which that resource is consumed
Created by: RABBARNETT