A slingshot fires a pebble from the top of a building at a speed of 10.3 m/s. The building is 38.4 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when it is fired vertically straight up.

28. a stone is projected at a cliff of height h with an initial speed of 42.0 mls directed at angle θ0 = 60.0° above the horizontal. the stone strikes at a, 5.50 s after launching. find (a) the height h of the cliff, (b) the speed of the stone just before impact at a, and (c) the maximum height h reached above the grou

How many atoms of nitrogen are in the chemical formula ni(w on

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.