Is there a "real" simple machine that has an efficiency of 100%?

12 drag each label to the correct category. decide whether each statement describes mass or weight. measured in newtons measured in kilograms does not change when gravity changes === a gravitational force changes when gravity changes the amount of matter in something mass weight

Identify the type of synthetic material used in each object

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?