Forms Of Energy

Question 1

what are the two main types of energy?

Answer 1

Kinetic & Potential

Kinetic: energy of a moving object
Potential: stored energy ready to be released

Question 2

What are examples of different types of potential and kinetic energy?

Answer 2

Kinetic: includes thermal, electrical, sound, mechanical, & light

Potential: includes nuclear, elastic, chemical, mechanical & gravitational

yes, both include mechanical

Question 3

what is gravitational potential energy?

Answer 3

potential energy due to position of an object relative to the Earth’s surface

Question 4

what is the formula for gravitational potential energy? what are the variations?

Answer 4

Ep (grav) = mgh
Ep = grav. potential energy (J)
m = mass (kg)
g = grav. acceleration (9.81m/s^2)
h = height (m)

m=Ep
gh

g=Ep
mh

h=Ep
mg

Question 5

what is elastic potential energy?

Answer 5

work done to an elastic or spring equals the amount of energy gained by the elastic or spring

Question 6

what is the formula for elastic potential energy?

Answer 6

Ep (elastic) = W
therefore
Ep (elastic) = Fd

Question 7

what is the formula for kinetic energy? what are the variations?

Answer 7

Ek = mv^2
2

find m:
m = 2Ek
v2
find v:
v = (square rooted)2Ek
m

Question 8

what is the formula for mechanical energy? what are the variations? (im sorry)

Answer 8

Em = Ep + Ek
therefore
Em = mgh + 1/2 mv^2

find Ep:
Ep= mgh
find Ek:
Ek = Em - Ep

find h:
h= v^2
2g
h = Ep
mg

find v:
v = (square rooted) 2gh
v= (square rooted) 2Ek
m

Question 9

What is the law of conservation of energy?

Answer 9

the total amount of energy remains constant as energy is converted from one form to another. Therefore, total mechanical energy always remains constant. Energy is always conserved