What Causes ‘Gravity’ and How Is It Measured?

Imagine you're holding a ball, when you let go, it falls to the ground. That's gravity! It’s like an invisible hand pulling everything toward Earth. Scientists use special tools called accelerometers and gravimeters to measure how strong gravity is in different places. Sometimes they even use falling apples or bouncing balls to see how gravity works.

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Examples

A ball falls to the ground when you drop it, that's gravity at work.
If you bounce a ball on Earth and then on the moon, it bounces differently because the moon has less gravity.
When you go up a mountain, your weight is slightly less, that’s because gravity weakens with height.

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Categories: Physics · gravity,measurement,physics