Energy Quiz
Potential energy decreases as an object goes higher up.
True
False

False

Explanation:

The potential energy of a body increases by increasing the distance or elevation from a reference level (ground). This energy can be easily calculated by means of the following equation.

where:

m = mass [kg]

g = gravity acceleration [m/s²]

h = elevation [m]

As we can see the potential energy is proportional to height, that is, as the body increases its elevation, its potential energy increases.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day