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**Gravitational Force**

How hard are you pulling at the Earth? (xmphysics)

How do you calculate the location of the null point between the Earth and the Moon? (xmtutor)

**Gravitational Field**

What is a gravitational field? (xmphysics)

Why do you weigh less on the equator? (xmphysics)

How do you calculate the effect of Earth’s rotation on the value of *g* on the Equator? (xmtutor)

Why is an astronaut in the ISS weightless? (xmphysics)

Why do objects fall more slowly on the equator? (xmphysics)

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