A boy weighing 350 N run up a flight of stairs consisting of 20 steps each 10 CM high In 10 seconds. what is his power?​

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Mixing salt in water is an example of physical change

Roger pushes a box on a 30° incline. if he applies a force of 60 newtons parallel to the incline and displaces the box 10 meters along the incline, how much work will he do on the box? a. 5.2 × 102 joules b. 6.0 × 102 joules c. -5.2 × 102 joules d. -6.0 × 102 joules