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Why in free falling elevator your head does not strike with the roof?
In a free-falling elevator, both you AND the elevator are falling at the same rate of acceleration with respect to the gravitational pull of the Earth. Therefore, since both you and the elevator both accelerate at the same rate, making your velocities increase at the same rate, and you both start off with the same initial velocity, you both travel at roughly the same velocity relative to each other during the entire descent, meaning that your head should not hit the roof of the elevator at any point.
If a cable snaps in an elevator and starts falling will the person inside float?
No, the person inside the elevator will not float. Objects in freefall experience weightlessness, but the person will still accelerate downward due to gravity. The experience will feel like weightlessness, but they are still subject to gravity's pull.
Do objects in Earth's orbit appear to be weightless because they are in free fall?
Yes, exactly. A useful way to think of an object in orbit is that it is falling towards Earth much like anything else but, because of its velocity and distance from earth, it keeps missing the ground. This seems slightly contradictory -- a weightless object under the pull of gravity -- but it isn't, really. Suppose you're in an elevator that's had its cables cut. (Heaven, forefend!). Gravity accelerates you and the elevator Earthward at exactly the same rate, so you feel like you're floating relative to the elevator, but you and the elevator are just falling at the same rate.
Suppose you were standing on a scale in an elevator in free fall what would the scale read?
If the elevator is in free fall, you and the scale would be accelerating downward at the same rate. In this case, the scale would read zero, because you and the scale are essentially falling together with the same acceleration due to gravity.
Why can't you jump in a falling elevator?
Jumping in a falling elevator won't help because you and the elevator are both falling at the same speed due to gravity, so jumping won't change anything. It's safer to lie flat on the floor and protect your head and neck during a fall.
Why are astronants weightless in space?
The astronaut, space ship and everything in it are all falling at the same speed (falling around the Earth is called ORBIT). If everything is falling at the same speed, they are effectively weightless. Its like falling in an elevator, if everything is falling at the same speed you will appear to be floating around the elevator. Until it reaches the basement.
Why in free falling elevator your head does not strike with the roof?
In a free-falling elevator, both you AND the elevator are falling at the same rate of acceleration with respect to the gravitational pull of the Earth. Therefore, since both you and the elevator both accelerate at the same rate, making your velocities increase at the same rate, and you both start off with the same initial velocity, you both travel at roughly the same velocity relative to each other during the entire descent, meaning that your head should not hit the roof of the elevator at any point.
If a cable snaps in an elevator and starts falling will the person inside float?
No, the person inside the elevator will not float. Objects in freefall experience weightlessness, but the person will still accelerate downward due to gravity. The experience will feel like weightlessness, but they are still subject to gravity's pull.
Do objects in Earth's orbit appear to be weightless because they are in free fall?
Yes, exactly. A useful way to think of an object in orbit is that it is falling towards Earth much like anything else but, because of its velocity and distance from earth, it keeps missing the ground. This seems slightly contradictory -- a weightless object under the pull of gravity -- but it isn't, really. Suppose you're in an elevator that's had its cables cut. (Heaven, forefend!). Gravity accelerates you and the elevator Earthward at exactly the same rate, so you feel like you're floating relative to the elevator, but you and the elevator are just falling at the same rate.
How high must a spacecraft be before weightlessness is detectable?
Its not a questions of height or altitude. Its about things free falling. A space ship falling around the Earth (everything in the space ship is also falling at the same speed) the astronauts are falling too. If you put a scale on the floor and an astronaut stepped on it, there is no downward force so it looks like they are weightless. Picture yourself in an elevator at the top floor. You're standing on a scale. Gravity pulls you and the scale, but the elevator floor prevent you from falling. The scale will measure your weight. If the elevator suddenly fell, it, you and the scale would all be accelerating towards the basement at 9.8m/s/s. The scale would read ZERO, because there is no force acting on the scale.
If you were to weigh yourself in an elevator that is in free fall would you weigh more?
Free fall means the upward acceleration of air resistance cancels out the downward acceleration of gravity, leaving only your mass. If you're confused about the difference between mass and weight: Weight = (mass) * (gravity (9.8 m/s^2)) Mass = weight/gravity
Suppose you were standing on a scale in an elevator in free fall what would the scale read?
If the elevator is in free fall, you and the scale would be accelerating downward at the same rate. In this case, the scale would read zero, because you and the scale are essentially falling together with the same acceleration due to gravity.
Was Jim Brown in a falling elevator?
yes
Why do astronaut feel weightless in space?
They actually are weightless, due to the fact there is no gravity in space. However a sky-diver would say he/she feels weightless, but they are experiencing free-fall.
Why can't you jump in a falling elevator?
Jumping in a falling elevator won't help because you and the elevator are both falling at the same speed due to gravity, so jumping won't change anything. It's safer to lie flat on the floor and protect your head and neck during a fall.
How do the people who travel in space feel?
-- weightless -- falling -- nausea -- loneliness -- isolation -- insignificant in size
Why does your stomach feel as if it is falling when an elevator first?
because of the gravity
