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*It is actually recording the Normal force the scale has to exert to support your weight. When you and the scale are stationary with respect to each other, these forces balance out and your weight is equal to the Normal force.*

- Elevator problems in Physics-5 Elevator Case Studies for you to solve
- Elevator Problems & Solutions 2017-2018
- The Art of the Elevator Pitch

*Loading DoubtNut Solution for you. JEE Main paper analysis February 26, shift 2, difficulty level, student reaction. JEE Main paper analysis February 26, shift 1, difficulty level, student reaction.*

## Elevator problems in Physics-5 Elevator Case Studies for you to solve

It is actually recording the Normal force the scale has to exert to support your weight. When you and the scale are stationary with respect to each other, these forces balance out and your weight is equal to the Normal force.

What if you and your scale are in motion, like in an elevator? If the elevator is stopped, the scale reads what you would expect it to read, your weight in an elevator. The same is true when the elevator is moving at a constant velocity.

There elevator is in equilibrium. You may notice that when the elevator begins to move, your weight seems to change. As the elevator begins to rise, you feel heavier. When the elevator descends, you feel lighter. The floor of the elevator pushes you and the scale upwards.

This means the scale has to push on the person with an extra force to push you and your weight up too. The new Normal force is greater than just your weight alone. The overall acceleration is up, so the acceleration is positive. There are two forces in action, your weight down -mg and the supporting Normal force.

Example Problem: A 75 kg man stands on on a scale in an elevator. When the elevator begins to rise, the scale reads kg. What was the acceleration in factors of g?

Solution: The scale is reading the Normal force. Using the equation we found for elevators moving up:. The acceleration of the elevator is one third of a gravity. Since the acceleration is positive, the direction is up.

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## Elevator Problems & Solutions 2017-2018

A kg person in an elevator. Determine the normal force exerted on the object by the elevator, if :. Known :. Wanted: The normal force N. Solution :. We choose the upward direction in the positive direction and the downward direction in the negative direction.

Application of Newton's law of motion on elevator - problems and solutions 1 Known: Person's mass (m) = 50 kg. Acceleration due to gravity (g) = 10 m/s2.

## The Art of the Elevator Pitch

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To solve these elevator problems in physics students need to understand couple of terms first like Normal Reaction, Weight, Net Force and Acceleration.

There are many different reasons that an elevator could start to not function properly, which ranges from it being an older operating system to having worn out sheaves.

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Lyzinski Physics. Page 2. 3) In order for a passenger in the ship to feel 2 g's, they must accelerate upward at a constant m/s2.