Is a space lift possible?
A space elevator is possible with today’s technology, researchers say (we just need to dangle it off the moon) Space elevators would dramatically reduce the cost of reaching space but have never been technologically feasible.
Is a space antenna possible?
Ad Astra’s massive space antenna isn’t real, but scientists do think about building big to reach the stars. Scientists have been thinking up technologies that could take humans to the stars without rockets. A giant tower would probably sink into the planet.
Why space elevator is not possible?
Historically, the main technical problem has been considered the ability of the cable to hold up, with tension, the weight of itself below any given point. The greatest tension on a space elevator cable is at the point of geostationary orbit, 35,786 km (22,236 mi) above the Earth’s equator.
How thick would a space elevator cable be?
The initial ribbon cable will be 5 cm wide at the base and taper to 11.5 cm at geosynchronous orbit. The thickness of this ribbon will be one micron on average. By this we mean the ribbon can be continuous as in a solid sheet one micron thick or it could be 1200 – 10 micron diameter fibers spaced across the 5 cm width.
Where can I build a space elevator?
Edwards: The elevator can be placed anywhere within 20 degrees of the equator due to the dynamics, but the performance is best at the equator. As you get off the equator, the ribbon goes up at an angle and eventually is lying close to the ground and is unusable.
How fast would a space elevator go?
Travel on a space elevator would not be fast! The travel time from one end to the other would be several days to a month. To put the distance in perspective, if the climber moved at 300 km/hr (190 mph), it would take five days to reach geosynchronous orbit.
Would a space elevator slow the Earth rotation?
Building the elevator will slow the earth by a negligible amount. Over time, launching spacecraft will slow it more but bringing back ore from the asteroid mines will speed it back up.
How much weight can you lift in space?
The crew performs their exercises using either a lift bar or a cable assembly. Resistive load can be adjusted between 0 and 600+ pounds for bar-related exercises and up to 150 pounds for cable-related exercises.
What happens if you push something in space?
If you were to push a spacecraft in space, you would fail and instead would push yourself back. Mass, by an operational definition, is an object’s resistance against a change in velocity. So the more mass an object has, the greater its resistance against a change in motion caused by an external force.
Are things lighter in space?
Yes, lifting heavy objects in space feels lighter as there will be no Gravitational force acting upon the objects. There will be zero Gravity. The objects’ mass remains constant.. When we lift something, we feel its weight only because of the earth’s gravity.
Is it easier to lift something in space then it is on Earth?
TL;DR: While weight is absent in space, mass does not change, and it’s mass, not weight, that makes something heavy hard to move. Something that’s hard to get moving on Earth is equally hard to get moving in space, and likewise with slowing something down.
Does being in space feel like falling?
Absence of gravity is known as weightlessness. It is like floating, the feeling you get when a roller coaster suddenly goes down. Astronauts on the International Space Station are in free fall all the time. The astronauts inside it experience weightlessness, floating around in no particular direction.
Can you feel acceleration in space?
In both cases there is a gravitational force on the human but this gravitational force causes the human to accelerate. And yes, this is why astronauts feel weightless in orbit even though there is indeed gravity in space.
Do astronauts feel speed?
It is not possible to feel speed while in a spacecraft. Astronauts in orbit travel at 28000 km/h but feel absolutely nothing, even if they’re outside. You feel the speed only if traveling through the air, where you feel the air dragging at you. Speed does not cause any harm at all, as you never feel any of its effects.
Why does acceleration feel good?
Yes, you do feel accelerations. The inertia of the fluid in the vestibular system exerts a pressure, which we pick up on. For example, sitting in a chair, I don’t feel the force of gravity other than the normal force exerting a pressure on my butt. If you jump, though, you can very easily sense the acceleration.
Can humans feel acceleration?
Actually, you can sense all accelerations. Free fall is no exception. Whenever you accelerate in one direction, you feel a gravity-like sensation pulling you in the opposite direction. The feeling of acceleration is really just your inertia acting to impede your acceleration.
Why don’t we feel the acceleration of the earth?
We can’t feel Earth rotating because we’re all moving with it, at the same constant speed. Image via NASA.gov. Earth spins on its axis once in every 24-hour day. It’s because you and everything else – including Earth’s oceans and atmosphere – are spinning along with the Earth at the same constant speed.
Is it possible to have a positive acceleration and slow down?
An object with negative acceleration could be speeding up, and an object with positive acceleration could be slowing down. How is this so? Consider the fact that acceleration is a vector that points in the same direction as the change in velocity.
What does zero acceleration do to an object at rest?
Thus, even though the velocity of an object at rest must be zero, acceleration can clearly be non-zero for objects at rest. A particle that is thrown vertically upwards stops momentarily at the highest point of motion.
Can an object be increasing in speed as its acceleration decreases?
Yes. An object will be increasing in speed so long as it’s acceleration is positive. Since it is possible for an acceleration to be both positive and decreasing, it is possible that an object can be both increasing in speed and decreasing in acceleration.
How do you figure out when a particle is speeding up or slowing down?
If 0″>a(t)=p′′(t)>0, the particle is speeding up. If a(t)=p′′(t)<0, the particle is slowing down. If a(t)=p′′(t)=0, then the particle is moving at a constant speed.
How do you make an object slow down?
Friction is a force that opposes the motion of objects; friction can cause objects to slow down. Air resistance is a type of friction. Air resistance causes moving objects to slow down.
How do you tell if a particle is moving left or right?
The y-values of v(t) represent the velocity (how fast its moving). The particle is considered moving to the right when the velocity function is positive (above the x-axis). The particle is considered moving to the left when the velocity function is negative (below the x-axis).
At what time t does the direction of motion of the particle change from right to left?
Thus the particle changes directions exactly once at t=3 seconds. The acceleration is the first derivative of the velocity. Hence, to get the velocity from the acceleration requires integration in time.