A stone is thrown vertically upward with a speed of 12.0 m/s from the edge of a cliff 70.0 m high. What is the magnitude of its speed just before hitting the ground at the base of the cliff? (answer should look like '18.9 m/s')

A ball is thrown upward with a speed and direction such that it reaches a maximum height of 24.0 m above the point it was released. At its maximum height it has a speed of 20.0 m/s. With what speed was the ball released?

A helicopter is ascending vertically with a speed of 5.21 m/sm/s . At a height of 102 mm above the Earth, a package is dropped from the helicopter.   How much time does it take for the package to reach the ground? [Hint: What is v0v0 for the package?] Express your answer to three significant figures and include the appropriate units.

An object is thrown upwards from the ground level at a speed of 58m/s. It travels upwards to the highest point of its path and then falls back to the ground. What is the objects speed and direction right as it is about to hit the ground at the end of it's fall? *   24 m/s upwards 24 m/s downwards 0 m/s upwards 9.8 m/s upwards 9.8 m/s downwards 58 m/s upwards 58 m/s downwards