2. When the same comet flies across the sky, it appears to be 5 miles long, how long would it be if it were not moving?

41.4 m/s

Explanation:

Consider downward direction of motion as negative

v₀ = initial velocity of the package as it is dropped over the side = 12 m/s

v = final velocity of the package just before it hits the ground

y = vertical displacement of the package = - 80 m

a = acceleration = - 9.8 m/s²

Using the kinematics equation

v² = v₀² + 2 a y

v² = 12² + 2 (- 9.8) (- 80)

v² = 144 + 1568

v = - 41.4 m/s

The negative sign indicates the downward direction of motion.

Hence the speed of package comes out to be 41.4 m/s