While standing at the edge of the roof of a building, a man throws a stone upward with an initial speed of 7.61 m/s. the stone subsequently falls to the ground, which is 18.1 m below the point where the stone leaves his hand. at what speed does the stone impact the ground? ignore air resistance and use g=9.81 m/s^2 for the acceleration due to gravity.

V=20.35m/s

Explanation:

First of all we need to calculate the time it took the stone to reach ground level. We know that ΔY = -18.1m; Vo = 7.61m/s; g=9.81m/s2

 Solving for t, we get:

t1 = -1.3s    t2 = 2.85s    We discard the negative solution and use the positive one. With this value we calculate the final velocity as:

Vf = Vo - g*t = 7.61 - 9.81 * 2.85 = -20.35 m/s

The speed is the module of the velocity, so:

V = 20.35 m/s

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

both the fifth and fourteenth amendments of the united states contain a due process clause. while the fifth amendment describes a legal obligation of the federal government to not deprived of life, liberty or property without due process of law, the fourteenth amendment applies the same obligation to the states to guarantee that all of the states provide fair procedures as well.