Mechanics | Relativity Answers

Why can the spacecraft being shipped to the Moon from an artificial Earth satellite, not be streamlined?

Is it posible to hit some "weightless" material with a "weightless" hammer in a spaceship? Please explain.

Why is a crater, or sometimes an air channel formed over the drain hole when the water is released from the tub?

Can a person while on a moving subway escalator be at rest in the reference system associated with the earth?

what is the force of gravity

What is the force of friction?

Will Archimedes buoyancy be influencing the block located tight at the bottom of the tank with liquid?