Goal posts at the ends of football fields are padded as a safety measure for players who might run into them. How
does thick padding around the goal post reduce injuries
to players?

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present