If the zero of potential energy associated with the force is at the origin, what is the potential energy at (5 m, 5 m)

The slope of a velocity time graph over any interval of time gives the during that interval

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration