A70 kg man climbs 4 meters up a tree whats his potential energy relative from the ground

Potential energy of the man relative to the ground can be calculated by using the formula,

P.E = mgh

Here, m is the mass of the man = 70 kg

g is acceleration due to gravity = 9.8 m/s²

h= height above the ground = 4 m

Substituting the value we get,

Potential energy of the man= 70×9.8×4= 2744 J

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