if we dig a hole through earth ,so we are able to see through it, & release any object in it, what will hapen?

Answer 1

Well, we'll have to make some assumptions here:

1) that the hole is stable (doesn't collapse) - certainly not true.
2) that you can drop an object absolutely straight down - difficult but possible.

Given these assumptions, we can have two cases:

a) frictionless - if there is no air resistance on the object, it will accelerate towards the center of the earth. Initially the acceleration would be 9.81 m/s^2 (that is, each second that passes the opbject will be traveling 9.81 m/s faster than the second before) but this rate will decrease as it moves towards the center. Right at the gravitational center of the planet the acceleration of the object will be 0, the velocity will be a maximum, and the net gravitational force will be zero. The object would then continue past the earth's center to a point equidistant from the center as the point from which it was originally dropped. Here acceleration is at a maximum (9.81 m/s^2) and velocity becomes zero. The object would then oscillate between these two points forever.

b) including air resistance. The answer is roughly the same, only the oscillation is damped now, so the object will travel slighly less far each time, and would eventually come to rest at the center of the earth.

Answer 2

It will accelerate towards the center of the Earth, reach the center and pass into the other side, where it will start to decelerate. After a while it will come back to the center again and come back 'up' the hole from the point of view of where you dropped it, and then fall back again, and keep on going in a cycle sort of like a pendulum. If there is air or any other kind of matter in the hole, then eventually it will come to rest at the center of the Earth. However, if there is empty space in the hole that it would continue to bounce back and forth from one side to the other, just reaching the height from which it was dropped on both sides, pretty much indefinitely. Essentially it would be in a linear-shaped orbit.

Answer 3

Well, in reality I guess it would melt before ever reaching the core (molten rock en iron core etc).

However, let's say that there is a hole. You drop the object, it accelerates until it reaches terminal velocity, or the center of the earth, whichever happens first. Beyond the center, gravity should start to slow it down, making so it will not actually reach the surface on the other end. When the velocity reaches zero, it will start to fall back, increasing speed until terminal velocity or center of the earth, pass the center, decelerate, fall back etc.

Basically in a sort of dampened sine wave it would back and forth until in the end it would stop at the center.

Answer 4

well u know how long it will take to dig a big whole i dont think you will get to see any part of the world trew dat hole n if u trow something it will stay in the hole

Answer 5

No ,cause there is the magma wich is hot and is full of lava so you can`t dig it just like that .hope I help see ya

Answer 6

Im thinkin it would sit somewhere in the middle...(that and the above poster could be right)

Answer 7

it will melt!

Answer 8

WE WILL DIE!!!!!