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Determining “Apparent Weight”

Determining “Apparent Weight”. The Elevator Problem. Elevator Problem Formulas. Remember: F (net) = m x a F g = mass x acc. due to gravity On a scale, there are two forces acting on you (F g & F n ) F n = F scale Therefore… F net = F scale – F g Elevator Demo.

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Determining “Apparent Weight”

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  1. Determining “Apparent Weight” The Elevator Problem

  2. Elevator Problem Formulas Remember: • F(net) = m x a • Fg = mass x acc. due to gravity • On a scale, there are two forces acting on you (Fg & Fn) • Fn = Fscale • Therefore… Fnet = Fscale – Fg Elevator Demo

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

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

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