ap physics problem

Question

in the jupiter gravitional acceleration is about, 90m/s^2. If an object falls from a height of 720m, what will be the velocity of object when it hits the ground.

Answer 1

We can use the kinematic equation

v²=v₀²+2a(x-x₀) and change to the vertical plane where a = g = -90 and v₀=0

V^2 = 2gh where g =90 and h = 720

V^2 = 2 * 90 * 720 =129,600

v = 360 m/s (really -360 since it will be downward)