In fluid dynamics, drag (sometimes called resistance) is a force which tends to slow the movement of an object through a liquid or gas. Air resistance, also known as drag, is a force that is caused by air, the force acts in the opposite direction to an object moving through the air.

The drag force depends on the square of the velocity. So as the body accelerates its velocity and the drag increase. It quickly reaches a point where the drag is exactly equal to the weight. When drag is equal to weight, there is no net external force on the object, and the acceleration becomes zero.

Terminal Velocity The downward force of gravity remains constant regardless of the velocity at which the person is moving. However, as the person’s velocity increases, the magnitude of the drag force increases until the magnitude of the drag force is equal to the gravitational force, thus producing a net force of zero.

Drag is the aerodynamic force that opposes an aircraft’s motion through the air. Drag is generated by the difference in velocity between the solid object and the fluid. There must be motion between the object and the fluid. If there is no motion, there is no drag.

Thrust

In space, there’s simply nothing to run into. However, if you’re an object in low-Earth orbit — like the International Space Station is — aerodynamic drag actually does exist.

The drag force on satellites increases during times when the Sun is active. When the Sun adds extra energy the atmosphere the low density layers of air at LEO altitudes rise and are replaced by higher density layers that were previously at lower altitudes.

In space without gravity pulling down on them, Astronauts are essentially weightless. It is important to explore the difference between mass and weight. While Astronauts may not weigh anything in space and can float around freely, their body shape and size does not change. Gravity is a force pulling matter together.

There is no air resistance in space because there’s no air in space. GRAVITY: Gravity, which will slow down a ball thrown up in the air, is present in space. But since gravity decreases with distance from a planet or star, the farther out into space DS1 is, the less gravity will slow it down.

300,000 kilometers per second

There is not exist an absolute the vacuum of space. The vacuum of space is relative, so that the vacuum force is relative. Rotate bend radiate- centripetal, gravity produced, relative gravity; non gravity is the vacuum force.

Objects moving through a vacuum or even interstellar space feel a universal drag from the photons that are everywhere, according to the 28 November PRL. Their calculations show that a lone object in motion experiences friction. It comes from the sea of real photons emitted by everything around it.