20) The kinetic energy of a ball changes from 10 to 15 J as it is dropped from a building. How much work did the force of gravity transfer to the ball?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

How do we measure or think of speed in the united states?

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line