A brick with a mass of 4.0 kh is in motion on a horizontal surface. A force of 15N is needed to push this brick towards the west at a constant velocity Please help ASAP I have homework due tomorrow I need helppp :(

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?

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.