Aball is thrown straight upward and rises to a maximum height of 18.0 m above its launch point. at what height above its launch point has the speed of the ball decreased to one-half of its initial value?

What is the most useful equation for electric power?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?