The only way to experience the effects of zero gravity, without going into outer space, is to ride on a zero-gravity flight in an airplane. As the plane passes over the top of a parabolic arc, the cabin becomes a sort of zero-gravity chamber, during which time passengers experience near-weightlessness.Continue Reading
The term "zero gravity" is something of a misnomer. The plane, and everything in it, are still subject to the Earth's gravitational pull. However, as the plane passes over the top of the arc, the centrifugal force temporarily balances out most of the downward pull of gravity, to the point where the effect of gravity feels negligible. What passengers experience is more accurately called "microgravity."
The effect of near-weightlessness generally lasts about 20 to 30 seconds at a time, after which the plane completes its dive and begins to ascend again. As the plane pulls out of its dive and begins to climb, the g-force increases, and passengers go from weightlessness to feeling as though their weight has nearly doubled. These flights can cause extreme motion sickness, earning them the nickname "vomit comets."
Flights of this sort, long used by NASA to prepare astronauts for the sensation of weightlessness, have become available to the general public in recent years. Since 2007, a company called Zero Gravity Corporation has taken passengers up in a modified Boeing 727 and allowed them to experience microgravity. Generally, the pilot performs the ascent and descent pattern no more than 15 times, as a way of limiting the motion sickness some passengers experience.Learn more about Motion & Mechanics
The hydraulic ram pump works by suddenly closing a valve in a water line to produce a surge in pressure that is collected in a pressure chamber. The process involves valves that automatically open or close depending on the pressure inside the pump.Full Answer >
Acceleration is the rate at which an object changes its velocity -- for example, the increase in a skydiver's speed after he jumps out of an airplane. Acceleration is a vector quantity, which is a quantity that takes into account magnitude and direction.Full Answer >
An example of mechanical force is the thrust of an airplane. The airplane's engines make use of a propulsion system, which creates a mechanical force or thrust. Without thrust, an aircraft cannot move in the air.Full Answer >
Examples of fluid friction include hailstones falling from the atmosphere, the drag of air on an airplane, water slowing the speed of a boat, air slowing a bullet and fish swimming underwater. Fluid friction occurs around a solid object moving through a liquid or gas medium.Full Answer >