Conceptual Physics I, Day 4
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Gravity is one of the fundamental forces. How many kinds of fundamental forces are there? How does gravity compare in strength to the others?
How does the gravity force change with distance?
How does the gravitational force of the earth on the moon compare with the moon's gravitational force on the Earth?
How does the gravity force acting toward the center of the Earth cause satellites to go around in orbit?
What causes the tides? Why are there two per day instead of just one?
How do you get a satellite to stay above one point on the earth for communication purposes?
If an object weighs 600 N at the Earth's surface, what will it weigh twice as far out from the Earth's center? ...three times as far out?
*Law of gravitation
*Inverse square law
*Gravity in orbit
*Newton's 3rd Law
Conceptual Physics I, Day 6
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