How does the mass of the Earth impact the numbers of days in the year

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

What is friction? how does it affect the motion of an object?

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.