If a man has a mass of 74 kilograms runs 800 meters in 150 seconds, what is
his average momentum?

3.94 kg*m/s

Explanation:

Use eqation for momentum: p=m*V

m-mass

V-speed

Speed is calculated using: V=S/t

S-distance (800m)

t-time(150 s)

V=S/t

V=800m/150s

V=5.33m/s

Now calculate momentum:

p=m*V

p=74kg*5.33m/s

p=3.94kg*m/s

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