Ch. 12 Universal Gravitation
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explain Newton’s idea that the moon, like an apple, falls towards
Earth.
explain why the moon does not fall into Earth, nor the planets into
the sun.
state and interpret Newton’s Law of Universal Gravitation.
explain the connection between gravitation and the idea that the
universe may stop expanding and begin to contract.
distinguish between g (gravitational acceleration) and G (the
universal gravitational constant).
explain why an astronaut in orbit seems weightless even though there
is a gravitational force on the astronaut.
describe how an object (satellite) can continue to fall around the
object (planet, star, moon, etc.) that they’re orbiting.