Usually, an object's apparent weight is its mass multiplied by the vector difference between the acceleration of the object and the gravitational acceleration. This definition means that apparent weight is a vector that can make a move in any direction, not just vertically. Image will be uploaded soon.
You might already be aware that the earth attracts everybody towards its centre with some force of attraction known as the gravity force. Because of this force of gravity, all bodies experience their weight. But if the body is on a plane that is accelerated up or down, then the force deployed on the plane by the body i. In such an instance, a person perceives his altered weight apparent weight.
True or real weight simply is weight. So, what is your true weight? It's simply the mg. Mass multiplied by gravity. Learn from the best tutors. Get amazing results. Learn more. Welcome, Guest. Please login or register. Thus when you accelerate to the left, you feel a gravity-like experience toward your right.
It is this effect that seems to throw you to the right whenever the car you are riding in turns toward the left. In fact, this effect is caused by your own inertia—your own tendency to travel in a straight line at a constant speed. As the lift accelerates, this acceleration needs to be added to the acceleration due to gravity about 9.
In similar fashion, at the end of the lift journey, the lift decelerates and this deceleration is subtracted from the acceleration due to gravity and the total is multiplied by your mass to give the lighter "apparent weight". This effect is readily apparent - you can feel it happening in most lifts. Here is a nice demonstration , if you can get it to run. See also this related question Accelerating an elevator.
There are also plenty of other resources all over the internet - it's a fairly standard question. Unlike the other answers I'm going to assume that you have been given a hyperbolic example of a building that reaches up into space.
What you would call the 'true weight', I suppose, is the reading of a set of scales on the surface of the Earth, if these scales are calibrated for the surface of the Earth.
You can just as well apply this ratio to the measured mass to find the true mass if you're actually using bathroom scales. While it is true that the gravitational force dissipates with respect to distance squared, that is not the reason a scale would output a "different weight". A scale does not actually measure weight, only it's response to it. That is, the scale reads the normal force.
If the elevator was motionless, the normal force would be equivalent in magnitude to your weight. Therefore, the scale reading would also happen to be your weight. Now consider an accelerating elevator. We can easily analyze what's going on mathematically. That is the normal force is the sum of your weight and the relative force associated with the accelerating elevator. Physically, you can think about the electrons which account for the normal force in the scale.
When the elevator is motionless or constant speed , and you are standing on the scale, those electrons will push back with equal force. However, when the elevator is accelerating upward, those electrons are forced to be closer to your feet. The response then is simply a larger normal force. True weight actually the product of mass and gravitational acceleration which is equal to mg where the apparent weight is the sum of net forces when you standing in elevator and elevator is moving either upwards or downwards, either high speed or low speed then you feel your weight heavier or lighter this is the apparent weight that u feels which is equal to sum of net forces.
On the other hand when you jump from a certain height you feel weightless in that time no normal force present then net force 0 so that time apparent weight is zero. In short apparent weight is the weight that you feel. Sign up to join this community. The best answers are voted up and rise to the top.
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Learn more. Trouble understanding the concept of true and apparent weight Ask Question. Asked 7 years, 1 month ago. Active 5 years, 4 months ago. Viewed 46k times. Improve this question. ProfRob k 11 11 gold badges silver badges bronze badges. Strictly speaking, "weight" is just mass times force. Mass times force makes no sense. Add a comment. Active Oldest Votes.
Improve this answer. John Red John Red 2 2 bronze badges. It's apparent weight! That value includes centrifugal acceleration term the centrifugal acceleration at 45 degrees latitude.
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