A person throws a 0.21 kg ball straight up into the air. It reaches a height of 10 m. What is the force on the ball as it begins to fall? (The acceleration due
to gravity is 9.81 m/s2)
O A. 4.32 N
B. 4.67 N
C. 1.18N
D. 2.06 N

v=ir = 3x15 =45 v

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