When a skateboarder rides down a hill, the normal force exerted on the skater by
the hill is

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Answer as quick as ! kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energyb. motion energyc. sound energyd. thermal energy