#gravity train

[goodoldbandit]

A Journey Through Physics and Imagination.

Sanjay Kumar Mohindroo Sanjay Kumar Mohindroo. skm.stayingalive.in Did You Know You Could Fall to the Center of the Earth in 19 Minutes If a tunnel ran through the Earth, a free-fall trip to the center would take just 19 minutes. Explore the physics, history, and science of this fascinating concept. The Fascination of Falling Through Earth A Hypothetical Yet Scientific Adventure Have you…

A Journey Through Physics and Imagination.

[trainmaniac]

Surplus energy rides the 'gravity train'

A company in California has developed a gravity train to store and transport surplus electricity.

[universetoday]

What If We Dug a Tunnel Through the Earth?

What If We Dug a Tunnel Through the Earth?

If we could dig a tunnel through the Earth, what would happen? And is this even possible? (more…)

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[sciencesoup]

Free Fall through the Earth

In the late 17th century, British scientist Robert Hooke wrote to Isaac Newton and discussed the mathematics of a thought experiment—one where an object was dropped down a tunnel drilled through the earth. He was fascinated by the physics of it: For the first half of the journey, gravity would pull the object into free fall. It would accelerate until it reached the midway point, where it would decelerate because it would be climbing away from the centre of the earth—and yet in a completely frictionless environment, it would have exactly enough inertia to reach the opposite end of the tunnel before it stopped completely. If the earth was a perfect sphere and the tunnel was frictionless, the trip would always take exactly 42 minutes and 12 seconds no matter at what angle the tunnel was drilled. Of course, this perfect scenario doesn’t exist in the real world, but the thought experiment still presents a dazzling engineering prospect—an incredibly fast transportation system (say, a train). Building this “Gravity Train” was first proposed in the 1800s, but the Paris Academy of Sciences wisely declined the ambitious plan—and even now, the concept is seemingly out of reach. Billions of cubic metres of rock would have to be hauled away to even drill the tunnels, the extreme heat and pressure of the core and mantle would present a huge problem, and measures would have to be taken to minimise friction. Transporting cargo between continents seems like a more feasible outcome than transporting humans, but we can hope that some incarnation of this Gravity Train will come into the realms of possibility before another four hundred years has passed.

(Image Credit: 1, 2)

[mirapermatasarisasmita]

IDE GILA!

Terkesan tidak masuk akal untuk saat ini, tapi bisa jadi akan menjadi kenyataan di masa yang akan datang.

GRAVITY TRAIN

High speed train yang punya trek di dalam perut Bumi, bahkan melewati inti Bumi sendiri.

Memungkinkan kita berpergian dari satu ujung Bumi ke ujung yang lain hanya dengan waktu 42 menit saja!

BRILLIANT!