Topic 8 Forces Doing Work - Definitions (Higher) - PMT Extended

?
Closed System
A system that experiences no net change in its total energy when energy transfers occur within it.
1 of 9
Dissipation of Energy
Energy that is transferred to, and spread out in, the surroundings. It is usually in the form of heat, and is a result of a system undergoing a rise in temperature.
2 of 9
Efficiency
The ratio of useful output energy transfer to total energy input. It can never exceed 1 or 100%, due to the conservation of energy.
3 of 9
Gravitational Potential Energy
The store of energy that all moving matter has. It is directly proportional to the mass of the object, the distance that it is raised, and the gravitational field strength at that point.
4 of 9
Kinetic Energy
The store of energy that all moving matter has. It is directly proportional to the object's mass and to the square of its velocity.
5 of 9
Power
The rate at which energy is transferred, or the rate at which work is done. It is calculated by dividing the work done by the time taken.
6 of 9
Resistive Force
When a force opposes an object's motion, the moving object will do work against the restrictive force.
7 of 9
Watt
The unit of power. It is equal to one joule per second.
8 of 9
Work Done
Work is done on an object when a force causes it to move through a distance. It is equal to the product of the distance travelled and the magnitude of the force in the direction of motion.
9 of 9

Other cards in this set

Card 2

Front

Dissipation of Energy

Back

Energy that is transferred to, and spread out in, the surroundings. It is usually in the form of heat, and is a result of a system undergoing a rise in temperature.

Card 3

Front

Efficiency

Back

Preview of the front of card 3

Card 4

Front

Gravitational Potential Energy

Back

Preview of the front of card 4

Card 5

Front

Kinetic Energy

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Forces resources »