Troy's weight has always been around 180 pounds. when he gains a few pounds, he usually drops down to 180 relatively quickly but rarely drops below his usual weight. troy's "standard" weight exemplifies which weight theory?

Need in all of themmm only answer if you know plsssss

Which sound characteristic is not affected by the relative motion of an object

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.