The discussion centers on the gravitational force as described by the formula F = Gmm'/r^2, which applies to point masses. Participants clarify that this formula calculates the gravitational force between two bodies and is universally applicable, including for celestial bodies like Mercury. The conversation also explores the concept of apparent weight during free fall, concluding that it is zero when not in contact with a surface. Additionally, the gravitational constant G is affirmed as a universal constant used in all gravitational calculations.
PREREQUISITESStudents of physics, educators teaching gravitational concepts, and anyone interested in the effects of gravity on weight in different environments.
Miike012 said:F = Gmm'/r^2
Does this explain the sum or total gravitational force between two bodies?
Miike012 said:Ok thank you.
Maybe you can help with this question as well...
During a jump off a diving board, is your apparent
weight (a) equal to your true weight, (b) slightly less
than your true weight, (c) slightly more than your true
weight, or (d) zero?
The answer is zero? I thought it would have been (b)
Miike012 said:Actually one last question also... Why do we use the gravitational constant G?
Is this only relevant to earth? therefore if I wanted to calculate the gravitational force of an object to mercury I would have to use another value that is not G?
DaveC426913 said:Why do you think it would have been b?
If you held a bathroom scale against your feet during your jump, what do you think the scale would show as your weight?
Weight is what a scale measures. It measures the force placed upon it. On the moon you would weigh less.Miike012 said:So if I was listening to my self I should have actually said the weight would stay the same.