Question

What does it mean when stated, By changing the sign of the gravitational constant, the work on the object also becomes positive or negative.

Answer 1

answer:-

good question,

for this type of questions we require some knowledge of classical mechanics,

so we know ,

Newton laws of gravitation,,

Newton's Universal Law of Gravitationstates that any two objects exert a gravitational force of attraction on each other.

mathematical defined as,

The magnitude of the gravitational force is:

F12 = Gm1m2/r2 where G is gravitation constant & has value G=G = 6.67 x 10- 11N m 2 /kg 2.t he inertial mass of an object determines the amount of force needed to produce a given acceleration of that object. The gravitational mass determines the force of gravitational attraction between two bodies. In Newtonian mechanics, these two masses have no obvious connection with each other. Nonetheless, it was observed empirically that they are numerically equal. This remarkable fact was known for centuries, but remained unexplained until Einstein's General Theory of relativity. ​​​​​ Gravitional Potential Energy Due to the gravitational force of attraction, any two objects with masses m1 and m2 located a distance r apart have the ability to do work. Hence they have potential energy. The gravitational potential energy of such objects is: PE grav = - Gm1m2/r gravitation potential energy is always negative. so we change the sign of G,then potential energy is changing. but we require work so energy nothing' but work done. so potential energy is negetive when gravitation constant is positive ans visa. is this answer helpful?