Gravitation: Gravitational Fields: Edexcel A-level Physics
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- Опубликовано: 12 сен 2024
- Detaling what you need to know about Grav Fields, Newton's Universal Law of Gravitation and orbiting bodies.
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Hi, great video. I wanted to ask what you meant when you said that the time period is independent of the mass of the object orbiting. Isn't the equation T²=r³×(4π÷Gm)?, so isn't the m the mass of the orbiting object/planet.
No, in this equation, that is M rather than m.. so it's the mass of the Sun rather than the mass of the planet. If you look back through the derivation, you'll see that M comes from the original expression for grav force.
@@nutshellphy Does this mean that if any other of the planets was in the Earth's position, then they will have the same time period as the Earth around the Sun?
what is lowercase g in the formulae? 9.81?
Yes! Gravitational field strength.