General Knowledge - Basic General Knowledge - Discussion

What's the reason?

Gravity is relative to the reference frame. Einstein proved that acceleration and gravity are indistinguishable. If the reference frame is accelerating toward Earth's axis, then centrifugal acceleration of the reference frame partly cancels the gravitational attraction of Earth's mass.

It is ridiculous to make impossible assumptions; Earth's rotation will not increase significantly in less than a million years. However, at the equator, you weigh slightly more on a westbound train than on an eastbound train. In a sidereal reference frame centered on Earth but not rotating with Earth, your weight doesn't change.

Source:

http://in.answers.yahoo.com/question/index?qid=20100629102422AABWDeF

Excellent !

Excellent Explanation Akshay..!

Good Explanation.

I have some doubt in Akshay's answer. If centrifugal force trying to pull the body outside then the centrifugal force on the body increases. Then why don't we add centrifugal force to the weight. And why do we need to add centrifugal force to weight.

Weight=m*g (in general case).

Now as the earth rotates with more speed it is likely to produce more centrifugal force as per mv^2/r as we (velocity) will increase as stated. Are (radius of earth) remains constant.

Now centrifugal force tries to cancel out the gravity force (basic concept). The increase in centrifugal force will try to decrease weight of body which is essentially nothing but gravity's effect on mass.

If you observe the same principle is used in satellites, as they rotate with certain speed they come under earth's gravitation field or in other words they cancel out gravitation force which is trying to bring satellite on the earth.

Weight shuold remain constant. Because being in inertial frame. No effect on body's weight should take place.

Please explain the reason.

I'm sorry if that was too technical an explanation, I do realise this was a General knowledge question but that seemed like the most legit explanation.