1. Determining “Apparent Weight” The Elevator Problem

2. Elevator Problem Formulas Remember: 1. F (net) = m x a 2. F g = mass x acc. due to gravity =mg 3. On a scale, there are two forces acting on you (F g & F n ) 4. F n = F scale 5. Therefore…F net = F scale – F g Elevator Demo

3. Set Up and Apparent Weight Outcomes to Know When an elevator is at rest or in constant motion F net = zero, so… F scale = F g (Apparent weight is equal to actual weight) When an elevator is accelerating upward… F net = F scale – F g (Apparent weight will be greater than actual weight)

4. Set Up and Apparent Weight Outcomes to Know (cont.) When an elevator is accelerating downward… F net = F scale – F g (Apparent weight is less than actual weight) When in an elevator and the cable breaks!!! “Help Me!!! I Don’t Want To Die!!!” F net = F scale – F g (equal but opposite directions) You will feel weightless

5. Zero g and beyond Zero g dog Vomit comet (NASA) zero g experience MythbustersMythbusters and the Blue Angels