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# Vocab Quarter 1

TermDefinition
Reference point is the starting point you choose to describe the location, or position of an object.
Position is an object distance and direction from the reference point
Motion is a process of changing position
Displacement is a different between the initial and the final position of an object
Speed A measure of distance an object travel per unit of time
Constance speed is a rate of change of position in which the same distance is travel each second
Instantaneous speed is speed at a specific instant in time
Average speed is the total distance traveled divided by a total time taken to travel that distance.
Velocity is the speed and direction of a moving object
Acceleration is a measure of change in velocity during a period of time
Force a push or pull on an object
Contract force a push or a pull on one object by another object that is touching it
Non contract force a force that one object applies to another object without touching it
Gravity an attractive force that exists between all objects that have mass
Mass the amount of matter in an object
Weight the gravitational force exerted on an object.
Friction the gravitational force exerted on an object.
Net force the combination of all the forces acting on an object
Balanced forces Balanced forces
Unbalanced forces forces acting on an object that combine and form a net force that is not zero
Newton’s first law law that states that if the net force acting on an object is zero, the motion of the object does not change
Inertia the tendency of an object to resist a change in motion
Newton’s Second law law that states that the acceleration of an object is equal to the net force exerted on the object divided by the object's mass
Circular motion law that states that the acceleration of an object is equal to the net force exerted on the object divided by the object's mass
Centripetal in circular motion, a force that acts perpendicular to the direction of motion, toward the center of the curve.
Newton’s third law law that states that for every action there is an equal and opposite reaction
Force pair the forces two objects apply to each other
Momentum a measure of how hard it is to stop a moving object.
Law of conservation of momentum a principle stating that the total momentum of a group of objects stays the same unless outside forces act on the objects.
Sound wave a longitudinal wave that can travel only through matter
Pitch the perception of how high or low a sound is; related to the frequency of a sound wave
Echo a reflected sound wave
Energy the ability to cause change.
Kinetic energy energy due to motion
Electric energy energy carried by an electric current.
Potential energy stored energy due to the interactions between objects or particles.
Chemical energy energy that is stored in and released from the bonds between atoms.
Nuclear energy energy stored in and released from the nucleus of an atom.
Mechanical energy energy stored in and released from the nucleus of an atom.
Thermal energy the sum of the kinetic energy and the potential energy of the particles that make up an object.
Sound energy energy carried by sound waves.
Seismic energy the energy transferred by waves moving through the ground.
Radiant energy energy carried by an electromagnetic wave.
Energy transformation - the conversion of one form of energy to another.
Law of conservation of energy - law that states that energy can be transformed from one form to another, but it cannot be created or destroyed
Work the amount of energy used as a force moves an object over a distance.
Simple machines a machine that does work using one movement.
Inclined plane a simple machine that consists of a ramp, or a flat, sloped surface.
Screw a simple machine that consists of an inclined plane wrapped around a cylinder.
Wedge a simple machine that consists of an inclined plane with one or two sloping sides; it is used to split or separate an object.
Lever a simple machine that consists of a bar that pivots, or rotates, around a fixed point.
Wheel and axle a simple machine that consists of an axle attached to the center of a larger wheel, so that the shaft and wheel rotate together.
Pulley a simple machine that consists of a grooved wheel with a rope or cable wrapped around it.
Complex machines two or more simple machines working together.
Created by: jeelom11