Energy 1 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

what is the principle of conservation of energy?

A

it states that energy can nver be created or destroyed; it can only be transferred from one form to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

formula: efficiency

A

useful energy out / total energy in

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

gravitational and elastic potential always get converted to:

A

kinetic energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

batteries convert:

A

chemical to electrical to run devices

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

electrical devices convert:

A

electrical energy into sound, light, heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

formula: kinetic energy

A

0.5 x m x v^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what does kinetic energy depend on?

A
  • the mass if the object

- the speed of the object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

formula: gravitational potential energy

A

m x g x change in h

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

falling objects convert

A

Ep into EK

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the formula for a falling object

A

kinetic energy gained = gravitational lost

this is due to the principle of conservation of energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly