Life of Pi (film)
2012
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Special | 4m 29s | Video has closed captioning. Gravity is the force of attraction between two objects. It is what makes things fall and what keeps us from floating off into space.
- 4 min
Newton's Law of Universal Gravitation describes the strength of gravitational attraction between two objects. The gravitational force is equal to the mass of object 1 times the mass of object 2, divided by the distance between the objects squared, all times the gravitational constant (G).
- 16 min
- Sal Khan
- how can birds resist gravity and fly?It is the same principle as an airplane that is taking off. It has the thrust and the lift and so can resist gravity. In the case of the bird the l...
- Where does gravity ultimately come from? Do masses naturally have gravitational forces associated wi...@terryjbrennan You are incorrect. Photons are, by nature, massless. That is why they are able to travel at the speed of light (C) and not just belo...
- Where does the Big G come from and why is it that specific number?The constant G can be calculated from data from experiments. This was first done by Cavending 111 years after Newton published the formula. Basical...
- How come a helium balloon resist gravity ?helium has very less density so it apparently floats in air because air has a greater density. just as how ice floats on water because ice as a low...
- Gasses have very high kinetic energy. DO they escape earth's gravitational pull?On very rare occasions. A gas molecule, like any other escaping projectile, requires enough velocity (escape velocity) to leave from an orbiting pa...
- Hello, This might be slightly off-topic, but I had a doubt I couldn't clarify. Say, two objects of *...Let's take a different approach. Imagine the two masses are in orbit with mass M and m. Orbit is just continous freefall, which is why the ISS expe...
- If photons are massless particles, then why does gravity bend light?Photons have no rest mass, but they do have energy, and from relativity energy and mass are equivalent, so the photon will interact with gravity fo...
- I am a little confused at this point so my question might be invalid but lemme give it a try : An ap...Absolutely correct, but you will need millions if not billions, trillions, or more apples
- How is the mass of earth calculated?This was basically a three step process. 1) First of all, you have Newton's Law of Universal Gravitation, that states that the force of attraction...
- I'm gonna go a step further than Newton :D and ask *why do things have to follow the Universal Law o...Why does it need a cause? It could simply be the way it is. Electromagnetism isn't created by charges, rather a charge is simply how a particle int...
May 6, 2024 · Watch this video to find out more about these areas of immense gravity! Gravity on Earth. Gravity is very important to us. We could not live on Earth without it. The sun's gravity keeps Earth in orbit around it, keeping us at a comfortable distance to enjoy the sun's light and warmth. It holds down our atmosphere and the air we need to breathe.
Gravity is a force of mutual attraction between two objects that both have mass or energy. Newton's universal law of gravitation can be used to approximate the strength of gravitation forces between two objects as a function of the objects' masses and the distance between them. Created by Sal Khan.
