Examines weight, the force due to gravity, and the acceleration caused by this force.
Reviews the definition of gravity and how gravity relates to weight.
Find out how to apply knowledge of gravity and friction to rock climbing.
Discover how orbital motion makes people and objects seem weightless in space and how weightlessness affects toilets on the International Space Station.
Discover the difference between true weightlessness due to the absence of gravity and feeling weightless while in free fall.