A2-kg rock is thrown upward with a force of 150 n at a location where the local gravitational acceleration is 9.79 m/s2. determine the acceleration of the rock, in m/s2.

65.2 m/s²

Explanation:

F = magnitude of the force applied in upward direction on rock = 150 N

m = mass of the rock = 2 kg

g = gravitational acceleration = 9.79 m/s²

a = acceleration of the rock

Taking upward direction as positive, force equation for the motion of rock is given as

F - mg = ma

Inserting the values

150 - (2) (9.8) = 2 a

a = 65.2 m/s²

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

not too sure thinking all accelerations are pointed down