If he jumps from the plane with a velocity of +2 ft/s and, after 7 seconds of free fall, he has a velocity of -223ft/s, what is his displacement?

his displacement is 772.85 ft

Explanation:

Given;

initial velocity of his jump, u = 2 ft/s

final velocity of his jump, v = - 223 ft/s

time of motion, t = 7 seconds

acceleration due to gravity, g = 32.17 ft/s²

Let downward motion = positive direction

Let his displacement after 7s = Δh

Apply the following kinematic equation to determine his displacement.

Therefore, his displacement is 772.85 ft

the independent variable, or the one that is intentionally manipulated is the speed.

scientific laws are the result of testing theories and proving them to be facts.