An object in space has a constant velocity of 20m/s. What is its acceleration? If this acceleration does not change, when will it stop?

i) , ii) The object will not stop, as known acceleration is not different from zero.

Explanation:

i) When an object has a constant velocity, it means that both magnitude and direction of velocity does not change in time. Acceleration is the rate of change of velocity in time, as velocity is constant, acceleration must be zero. ()

ii) The object will not stop, as known acceleration is not different than zero.

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