IIT JEE , AIEEE Forum - Physics , Mechanics - what is the difference between normal and weight

satmat_007

what is the difference between normal and weight

eshaan

basically normal and weight are relative terms.

I am consiering the example of a man standing on a weighing machine accelerating upwards .

Now the forces on the man w.r.t the elevator frame are the weight downwards pseudo force(ma) downwards and a normal force upwards(force exerted by the machine). from this we get N=mg+ma. Now this reading of N will be shown by machine and would be the apparent weight of man.

P.S Mass remains same but weight can differ

jaggy

good answer but 1 thing is dat normal is apparent wieght and can be shifted from 1 point to another

by applying suitable force at suit. height but weight cant be

rate dis

varun.tinkle

NORMAL IS THE REACTION FORCE OFFERED BY AN OBJECT ON WHICH A BODY STANDS AND THE WEIGHT IS THE FORCE EXERTED BY THE BODY ON THE SURFACE IN CONTACT DUE TO GRAVITY

entropy

If a body is kept on floor , the ground will exert a reaction force making an angle $\theta$ with X axis as it is a inertial frame .............newton's third law

This reaction force is resolved in 2 components

Fcos $\theta$ =friction in X axis

Fsin $\theta$ =normal reaction force in Y axis

If we see in Y axis , normal force and mg (weight) are equal and opposite.thus they r related

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krishna.gopal

If a body is kept at a place where apparant gravity is g' then weight is mass*g'. This weight might be balanced by normal force in most of the cases but there may be cases when weight is not equal to normal force. Suppose you are pulling water from a well using pully. In this case the string will be pulling you upwards and hence normal will be les than the weight.

chinmay_saxena01

when a body is placed on a object,,,,then a reaction force exerted by object to body is called normal .while weight is the force exerted by the body due to gravity on the surface of contact..
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