Lesson 4 : Gravitational Potential Energy

Question 1

When referring to height in gravitaional potential energy?
Is this:
a.) Change of height
b.) Initial height
c.) Final height

Answer 1

This is change of height (a)
For instance if object is raised, it has gained height.

Question 2

When referring gravitational potential energy?
Is this:
a.) Inital store
b.) Change in store
c.) Final store

Answer 2

The change in store (b)
If an object is raised, it gained GPE.

Question 3

What is GPE measured in?

Answer 3

Joules (J)

Question 4

What is mass measured in?

Answer 4

Kilograms (Kg)

Question 5

What is gravitational field strength measured in?

Answer 5

N/Kg
weight/ mass = gravitational field strength

Question 6

If a question gives you the weight of an object, how can you apply this to the GPE equation?

Answer 6

w=mg (important equation)
GPE = m x g x h
Whatever N (Weight) is substitute in for mg.

Question 7

What is the equation that links mass, weight and gravitational field strength?

Answer 7

w = mg
Weight = massx gravitational filed strength

Question 8

What effect will halving the mass have on the GPE store?

Answer 8

Half GPE

Question 9

What effect will quadrupling the field strength have on the GPE store?

Answer 9

Quadruple GPE

Question 10

What effect will quadrupling the speed have on the GPE store?

Answer 10

No effect

Question 11

What is a gravitational field?

Answer 11

A gravtitaional field is the area surrounding an object where another body can experience a force.