Question:
A person is standing in an elevator. In which situation, he experiences weight loss?
A person is standing in an elevator. In which situation, he experiences weight loss?
Updated On: Mar 19, 2025
- When the elevator moves upward with constant acceleration
- When the elevator moves downward with constant acceleration
- When the elevator moves upward with uniform velocity
- When the elevator moves downward with uniform velocity
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The Correct Option is B
Solution and Explanation
Apparent weight \(= m(g – a) \)
\(⇒\) Weight loss in downward accelerated elevator
So, the correct option is (B): When the elevator moves downward with constant acceleration
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Concepts Used:
Types of Forces
Different types of forces that are found in nature can be broadly categorized into two types:
- Contact Force
- Action-at-a-distance Force
Contact Force
Contact Forces can further be divided into the following types:
- Applied Force: It is the force that one object exerts on the other object directly. For example, pushing a door, hitting a ball with a hockey stick, opening a drawer, etc.
- Frictional Force: Frictional Force is a type of Contact Force that opposes the movement of an object on a surface. In other words, it is a resisting force. For example, a ball rolling on a floor slows down and eventually stops, applying brakes to stop a vehicle, writing on a notebook, etc. Frictional Force is of two types: Static Friction and Dynamic Friction.
- Air Resistance Force: Just like a surface opposes the movement of an object, the air opposes the objects moving through it. This type of force is called the Air Resistance Force. The strength of the Air Resistance Force depends on the speed and the surface area of the object. Examples of Air Resistance Force are a person who is skydiving slows down because of the parachute, riding a bicycle, walking in a storm, etc.
- Tension Force: Tension is a type of pulling force that is transmitted through a string, cable, etc. It acts along the string and exerts equal pressure at both ends. For example, drawing a bucket of water from a well, playing tug of war, weighing using a spring balance, etc.
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Action-at-a-Distance Force
Action-at-a-Distance Force is exerted without the objects being in contact. The various types of Action-at-a-Distance Force are as follows:
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