Weight!!^^?

Question

Motion does not effect weight. But why not?

Answer 1

because weight is a direct measurement of gravitys pull on you r body. whatever motion you are doing does not affect earths gravity. Thank you come again

Answer 2

Weight is a force.
it is the result of a multiplication of the mass time the gravity force.
W = M * g.
Every thing have a constant M which is measured in Kg or Lbs. M is like a characteristic and does not change unless the thing we are talking about losses a piece.
G, on the other hand, is variable. It is dependent on the planet on which you are measuring the weight.
On earth G = 9.81.
G has 2 units meter per square second & Newton per Kg( m/s^2 or N/Kg)
so something with mass of 50 kg (= 110 lbs.) weighs 50 * 9.81 = 490.5 N on earth. But the same thing has different weight on the moon or other planets cause as I said there the G is different.
Now as you see, there is no motion factor in the equation.
It means the speed, acceleration, motion and all these stuff dont affect the value of W.
Cause W is only dependent on M & G

Answer 3

well this is partially true. Motion does not affect weight as long as it's moving at constant speed. If the object is accelerating it can either increase or decrease the weight (but not the mass). Try doing a free body diagram, in the case of constant motion there is no added force so that normal restoring force is unaffected (if the object is say sliding along a table).

Answer 4

Acually, it can. This law developed by Newton is somewhat related to the Force. (F=MA, Force= Mass x Acceleration).

Say, you had a 400 pound Sumo wrestler, and a man of 100 standing side-by-side. You are asked to choose who you'd rather be tackled by; of course, you'd choose the man of 100 pounds.

But, let's change the dynamics. Say, you have the Sumo and the man still, but the man, still the same weight, is now as fast as 90-100 miles per hour. He is told to go about 30-40 feet away. You, not knowing the laws, would still say the man, because you belive motion does not affect mass/weight, and you believe he wouldn't do much. Yet, if he could not kick in with invertia, you'd be pretty winded- maybe worse than a sumo plop.

Though, now, if you had these circumstances and you were hostage- you'd be pretty screwed. 400 pound man or a man who could achieve 400 lbs by running. ;]

But your wrong, even if he's 4 feet, and a man is 6 feet, he could run at that man with such accerlation, it could knock him over despite his build.

Acceleration could affect one's mass and give an object or body more force in task. Try looking up about that law- it might help.

Oh, your weight, PHYSICALLY doesn't change,, like you won't gain 300 pounds by going 90 miles per hour, it's just Newton's law at work. ;]

Hope that helped some!

Answer 5

Actually, motion does affect weight, if it it towards or away from a large massive body, say Earth. The farther you move away from Earth, the less you weigh, and the faster you move away from Earth, the faster your weight decreases.

Only in conditions of constant acceleration does motion not affect weight.

Answer 6

something 2 do with body mass or newtons laws about bodies in motion staying in mostion maybe
type in effects of motion on weight or something on google advanced search

Answer 7

why would it, gravity , not motion affects weight.

Answer 8

In relativistic mechanics it really does.