Jane is riding in a hot air balloon that is rising vertically at a constant speed of 3 m/s over a lake. she reaches out and drops a rock from the balloon when the distance from the rock to the water is 50 m. use g = 10 m/s2, and let the up direction be positive. about how long after jane drops the rock will it splash into the water?

The rock will splash into the water after Jane drops it.

Explanation:

Hi

and .

a second-grade polynomial, we obtain two roots, so and , due negative root has no sense, we take the positive one, so the rock will splash into the water after Jane drops it.

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

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg