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8 Cards in this Set
- Front
- Back
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Define gravitational field |
A region is space time that is curved that causes objects with mass to experience an accelerating force. |
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Define gravitational field strength |
The gravitational force acting per unit mass at a given point |
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What does uniform mean when describing a gravitational field |
Force is the same everywhere in the field. Lines of force parallel and equal distance |
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What is the gravitational field strength equation? |
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Why is the uniform gravitational field idea an approximation |
It is actually a radial field, so decreases with height. Also the earth is not a perfect sphere so g at poles is more (~9.83) and less at the equator (~9.78), and this difference is also because of the earth's rotation. |
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What is an equipotential surface |
A surface is said to be equipotential when there is no chance in energy if the object is moved from one to another asking this surface. |
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What is Newton's law of universal gravitation |
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What is G |
The gravitational constant 6.67 X 10^11 Nm2kg-2 |
