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4

Raising an orbit with a weak form of propulsion Yes the Sun's gravity is stronger than the Earth's on each body's surface, but it drops like $1/r^2$. See the math below. A spacecraft in a heliocentric orbit around the Sun will just continue to orbit the Sun without any propulsion for millions or possibly billions of years because the spacecraft is ...

1

Sort of. Note that this answer will be incomplete and only consider $\Delta V$, not strength. Don't accept it, since I expect a better one will come along. First, there is the obvious limit that we can't make fuel tanks infinitely thin and infinitely strong. Second, there is the obvious limit that we can't make a fuel tank that has no internal volume ...

4

This is a great question! so can you lift 200% of body weight in 0.5 gravity and only 50% body weight in 2 gravity? Yes. But... When we interact with objects having significant, large mass on Earth, there are two ways that we experience the mass; weight and inertia. Gravitational mass (as weight) This is the one that you discuss in your question, and ...

0

If you lift a weight, you could not use all the force of your muscles to lift the weight. You need some force to lift the weight of your arms or the upper part of your body. If gravity is so strong that you may lift your arms alone there is no force left to lift a weight. But a very strong gravity would reduce the blood flow to the brain so much that you ...

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