work and energy

Question 0

efficiency

Answer 0

ratio of the output work done by the machine to the input work done on the machine, expressed as a percentage

Question 1

work

Answer 1

transfer of energy when a force is applied over a distance; messured in joules

Question 2

mechanical advantage

Answer 2

ratio of the output force exerted by a machine to the input force applied to the machine

Question 3

energy

Answer 3

ability to cause change

Question 4

system

Answer 4

a region or set of regions around which a boundary can be defined

Question 5

kinetic energy

Answer 5

energy a moving object has because of its motion; determined by the mass and speed of the object

Question 6

potential energy

Answer 6

energy that is stored due to the interactions between objects

Question 7

elastic potential energy

Answer 7

energy that is stored by compressing or stretching an object

Question 8

chemical potential energy

Answer 8

energy that is due to chemical bonds

Question 9

gravitational potential energy

Answer 9

energy that is due to the gravitational force between objects

Question 10

law of conservation of energy

Answer 10

states that energy cannot be created or destroyed