What Is Pendulum Physics?
Free fall refers to the movement of conventional objects under the action of gravity and zero initial velocity, which is called free fall. Free fall motion is an ideal physical model. ( Free-fall ) is the inertial trajectory of any object under the action of gravity, at least initially, only when gravity is the sole force, and it is a uniformly accelerated motion with an initial velocity of 0. Since this definition does not specify the direction of the initial velocity, it also applies to the initial movement of the object upwards. Due to free fall, gravity outside the atmosphere causes weightlessness. Sometimes any state of weightlessness is called freefall due to inertial motion. This may also apply to weightlessness because the body is far away from the gravitational body. Although the strict definition of technical application does not include moving objects subject to other resistances, such as air resistance, in non-technical usage, they will pass through the atmosphere without a parachute or lifting device, also often referred to as free fall. The resistance in this case prevents them from producing a complete weightless state, thus reaching the terminal speed after parachuting the "free fall" to produce a feeling that the weight of the body is supported on an air cushion.
Free fall
(Physical term)
- Free fall
- Physical quantity relationship
- Based on the assumption that (objects are near the ground) gravity is constant, according to
- Clever reasoning
- 1.Spacecraft with rocket thrusters turned off
- Physics Show
- NASA's Zero-G Research Facility
- Flying photos of free-fall aircraft
- 2 Take an airplane (balance of weight and lift provided by the wings) Return to the atmosphere (atmospheric reentry) and parachute landing: weight is countered by reverse air resistance
- 3 Orbital maneuver of spacecraft: At this time, the rocket provides thrust, see acceleration and gravity acceleration.
- 2. Free fall stage during skydiving
- Falling in vacuum tubes on earth, for example: Physics Show
- Return to the atmosphere and parachute landing (weight is countered by reverse air resistance).