Very quick question about lift and apparent weight?

In summary, the conversation discusses the concept of apparent weight and its relationship to the normal reaction force and gravity. It is determined that apparent weight is equal to true weight when the lift is stationary or moving with a steady velocity, but changes when the lift accelerates. Additionally, the idea of what would happen if the lift accelerates downwards at a rate greater than 9.8m/s^2 is brought up for discussion.
  • #1
sameeralord
662
3
Hello everyone,

When you go down a lift, are you actually falling down. Is the lift carrying you down, or are you falling down due to gravity towards the lift, if the lift goes too fast would your head crash? Sorry if my thinking is completely wrong.

Ok now apparent weight is from the normal reaction force. Muscles pump blood up via veins and then they fall due to gravity and other factors. So when they fall and hit the interior of the foot, can't you feel it. So isn't apparent not just the normal reaction force.

Thank you :smile:
 
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  • #2
To work it out draw a free body force diagram for someone standing on scales and then apply Newtons second law.If the lift is stationary or moving with a steady velocity apparent weight = true weight.If it accelerates upwards apparent weight is bigger and if it accelerates downwards apparent weight is smaller.What do you think might happen if the lift accelerated down at more than 9.8m/s^2?
 

What is lift?

Lift is the force that acts on an object in a fluid (such as air or water) that is moving relative to the fluid's surface. It is perpendicular to the direction of motion and is the result of differences in pressure between the upper and lower surfaces of the object.

How is lift related to apparent weight?

Lift is not directly related to apparent weight. Apparent weight is the perceived weight of an object in a fluid, which can be affected by factors such as buoyancy and drag. However, the lift force can contribute to the apparent weight of an object by either increasing or decreasing it.

What factors affect the amount of lift on an object?

The amount of lift on an object is affected by several factors, including the shape and size of the object, the speed and direction of its motion, the density and viscosity of the fluid, and the angle of attack (the angle between the object's surface and the direction of motion).

Can an object experience lift in a vacuum?

No, an object cannot experience lift in a vacuum because there is no fluid present for the lift force to act upon. Without a fluid, the object's motion will not be affected by lift.

What is the significance of lift in aviation?

Lift is a critical component in aviation as it is what allows airplanes to fly. By generating enough lift, the wings of an airplane can overcome the force of gravity and keep the plane in the air. Pilots must have a thorough understanding of lift and how to control it in order to safely operate an aircraft.

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