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Force and Motion

Terms in this set (42)

Speed
The distance an object travels in one unit of time
Acceleration
The rate of which velocity changes
Reference Point
A place or object used for comparison to determine if an object is in motion
Average Speed
An interval of time is the distanced traveled by the object divided by the duration of an interval
Instantaneous Speed
The motion rate of an object at a particular time period
Displacement
The moving of something from it's place/postion
Velocity
Speed in given direction
Motion
The state in which one object's distance from another is changing
Force
A push or pull exerted on an object
Inertia
The tendency of an object to resist any change in its motion
Friction
The force that one surface exerts on another when 2 rub against each other
Newton
A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second
Net Force
The overall force on an object when al the indivudl forces acting on an object are added
Newton's First Law of Motion
An object at rest will remain at rest and an object that is moving at constant velocity will remain at constant velocirt
Newton's Second Law of Motion
The net force of an object is equal to the product of its acceleration and mass
Newton's Third Law of Motion
For every force there is a reaction force that is equal in size, but opposite in direction. That is to say that whenever an object pushes another object it gets pushed back in the opposite direction equally hard.
meter
The basic SI unit of length
International System of Units
A system of measurement based on multiples of ten and on established measures of mass, length, and time.
unbalanced forces
Forces that cause a change in the motion of an object; net force not = 0
balanced forces
Equal forces acting on an object in opposite directions; net force of 0
Mass
the amount of matter in an object
sliding friction
friction that occurs when one solid surface slides over another
rolling friction
friction that occurs when an object rolls over a surface
fluid friction
friction that occurs as an object moves through a fluid or gas
Gravity
A force of attraction between objects that is due to their masses.
free fall
when the only force acting on an object is gravity
projectile
an object that is thrown
air resistance
the fluid friction experienced by objects falling through the air
terminal velocity
The greatest velocity a falling object can achieve
Weight
the force of gravity on an object
Momentum
The product of an object's mass and velocity
law of conservation of momentum
law that states that the total momentum of the objects interaction is the same before and after the interaction.
Energy
the ability to do work
kinetic energy
the energy an object has due to its motion
potential energy
Energy that is stored and held in readiness
elastic potential energy
the potential energy of an object that is stretched or compressed
gravitational potential energy
Potential energy that depends on the height of an object
thermal energy
The total energy of all the particles of an object.
chemical energy
potential energy stored in chemical bonds
electrical energy
moving electrical charges that produce electricity
electromagnetic energy
travels in waves that have some electrical properties and some magnetic properties; such as light
nuclear energy
The potential energy stored in the nucleus of an atom
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