Assume that a friend hands you a heavy book to hold as he turns the combination lock on his locker. which of you does more work?

None of us is doing work

Explanation:

None of us is undergoing work because it is said that for work to be done a force applied to a body must cause the body to move through a "distance". According to both me and my friend, we are both at a particular position (not covering any distance) and as such work has not been done by any of us not until we leave our position of rest to cover a particular distance.

it is called kinetic energy

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