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Chapter 5 vocab
Chapter 5
20
Physics
Not Applicable
10/20/2006

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Term
Work
Definition
process of energy transferred in or out of the system, equals the amount of energy transferred, determined by product of force in direction of motion
Term
Power
Definition
rate at which work is done or can be done, scalar
Term
Energy
Definition
measures ability to do work
Term
Kinetic energy
Definition
energy of a moving object or ability to do work
Term
Gravitational Potential Energy
Definition
energy that an object has in a gravitational field
Term
Elastic potential energy
Definition
energy in a stretched or compressed spring
Term
Work-energy theorem
Definition
the net work on a system changes its kinetic energy
Term
Conservation force
Definition
force for which works depends on starting and ending points of motion
Term
Nonconservative force
Definition
force for which work depends on the path
Term
Closed (conservative) system
Definition
system of objects that experience conservation force only
Term
Open(nonconservate) system
Definition
system subjected to nonconservative forces
Term
Mechanical energy
Definition
sum of kinetic and potential energy
Term
Conservation of mechanical energy
Definition
in a closed system total amount of mechanical energy before and after physical process remains the same
Term
Linear momentum
Definition
vector physical quantity equal to product of mass times velocity,
Term
Impulse
Definition
vector, equal a product of a force with a time interval
Term
Isolated system
Definition
group of objects which the net external force (external action) is equal to zero
Term
Elastic collision
Definition
collision in the system of 2 or more bodies during which there is conservation of momentum and kinetic energy
Term
Inelastic collision
Definition
collision in the system of 2 or more bodies during which there is conservation of momentum but no conservation of kinetic energy
Term
Jet (rocket) propulsion
Definition
force produced by an ejected gas on a jet engine’s (a rocket’s) body
Term
Conservation of linear momentum
Definition
in isolated system total amount of linear momentum remains the same
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