conservation of energy

Question 1

How is energy defined?
What is the conservation of energy?

Answer 1

The ability to do work.
Energy can’t be created or destroyed only transferred.

Question 2

Name 8 types of energy?

Answer 2

GPE, KE, chemical, kinetic, electrical, sound, thermal, nuclear, elastic potential

Question 3

What’s the formula for GPE?

Answer 3

GPE = m x g x h

Question 4

What’s the formula for KE?

Answer 4

KE = 1/2 x m x v^2

Question 5

What are 4 energy pathways?

Answer 5

mechanically
electrically
by heating
by radiation

Question 6

What are 4 energy pathways?

Answer 6

mechanically
electrically
by heating
by radiation

Question 7

What’s the formula for efficiency?

Answer 7

useful/total

Question 8

If a system is open…

If a system is closed…

Answer 8

energy can be transferred in & out

energy cannot be transferred to surroundings

Question 9

What is dissipation?

Answer 9

Energy transferred by heating & radiation that spread to surroundings.

Question 10

How can friction be reduced?

Answer 10

Lubrication