A boy standing on a bridge 150m above the canyon floor throws a stone downward with a speed of 20.0m/s. A) with what velocity will it hit the ground?
B) How long will it take to descend?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.