What Causes ‘Gravity’ and How Does It Work on Earth?

Gravity is like a invisible string that pulls things together. Imagine you're holding a ball, when you let go, it falls to the ground because Earth is pulling it down. The bigger something is, the stronger its gravity. That’s why we feel Earth's pull but not from a tiny rock nearby.

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Examples

A ball falls to the ground when you drop it because Earth pulls it down.
You feel heavier on Earth than on the Moon because Earth has more mass.
A magnet pulling a paperclip is like gravity, both are forces that pull things together.

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Categories: Physics · gravity,earth,physics,force