projectile motion

Question

A plane is flying horizontally with speed 153 m/s at a height 5120 m above the ground, when a package is dropped from the plane. The acceleration of gravity is 9.8 m/s 2 .

What is the horizontal distance from the release point to the impact point? Answer in units of m.

A second package is thrown downward from the plane with a vertical speed v1 = 54 m/s. What is the magnitude of the total velocity of the package at the moment it is thrown as seen by an observer on the ground? Answer in units of m/s.

What horizontal distance is traveled by this package? Answer in units of m.

Answer 1

h=0.5*9.8*t^2

5120=4.9^t^2

t=10.2

distance = 153*10.2