Quiz - Question of the Day

[chanduchamaar]

Re: Quiz - Question of the Day

@TLK

I think you are confusing yourself with gravitational force vs acceleration due to gravity. Even their units are different. Gravitational force (G) unit is N(m/kg)^2 and acceleration due to gravity (g) is m/s^2. One is force and other is acceleration.

Also, Newton 's law of Gravitation is fundamentally wrong. It’s very static in nature as its written. F= Gm1m2/r^2 will immediately change if you remove or change one of the masses. In reality, it’s not true. If m1 is the mass of earth, and m2 is the mass of Sun in this equation, and if somehow Sun vanishes from our solar system this very moment, then according to the Newton 's law of Gravitation, earth will feel the change of force that very instance. In reality, it will take earth full eight minutes before it would feel any difference.

i never confused myself. i HAVE written the ‘g’ in units of m/s[SUP]2.[/SUP] and the units of force as per my equations come out to be Nm[SUP]2[/SUP]/Kg[SUP]2.
[/SUP]
**what i intended to say was : when someone says ‘gravity’, technically he/she is saying ‘acceleration due to gravity’ and is not saying ‘gravitational force’. **

i’m sad i couldn’t express it well.

the equations are more accurate when they’re expressed in differential form. so F=ma should be, F = md(v)/d(t) + vd(m)/d(t) am i correct?