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3 cards from this section. Quick, good the night before a test.
What is gravitational shielding?
Consider how electrical forces can be shielded.
What is the escape velocity from the Earth's surface?
Think about how fast an object needs to be to leave Earth's gravity.
Does gravitational shielding exist?
Think about how gravity works in comparison to electrical forces.
What is the escape velocity for an object leaving Earth?
Remember the required speed to overcome gravity.
A satellite is in a stable orbit around Earth at 400 km above the surface. Calculate the potential energy required to shift it to an orbit at 800 km.
Calculate potential energy at both heights and subtract.
If the escape speed from Earth is 11.2 km/s, what will be the escape speed from a planet with double the mass and the same radius?
Think about the relationship between mass and escape velocity.
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