The missile was fired at 45 ° alpha angle from a slope with a height of ℎ = 6 m. The missile falls below the slope at a distance of l = 18 m from the place of launch. Disregarding air resistance, determine the value of the initial velocity.

false

explanation:

boats, things on boats luggage are way more heavy then water.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -

wavelength divides in half and speed stays the same.