Newton says...

$$F = {G \times { {m_1 \times m_2} \over d^2}}$$

Scary? Don't panic. It means that to know the amount of gravitational force between two objects you multiply the mass of the two objects together (\(m_1\) times \(m_2\)) then divide the result by the distance between them (\(d\)), and again by the distance. Finally, you multiply by a number called \(G\) which has the exact value needed to get the force right. Easy stuff. Let's play with it.

As the first object we pick an average human being, mass \(=\) 70 kg

The second object is... pick a planet!

change planet

Jupiter, Saturn, Uranus and Neptune are scaled down 10 times

's mass is \(\) kg.

At this very moment it is at km from Earth.

The force it applies on our average human being is very small, N if you like numbers.

As a comparison, a 1 liter bottle of water pushes down against your hand with a force of about 10 N.

What does it compare to?

What moving objects on Earth pulls on us with the same gravitational force?

Click or touch any of the objects below.

The largest oil tanker in the world, fully loaded pulls with the same force of

A typical oil tanker, fully loaded pulls with the same force of

A carrier ship, fully loaded pulls with the same force of

A cruise ship, fully loaded pulls with the same force of

More ships

A train, with passengers pulls with the same force of

An Airbus A380, with passengers and fuel pulls with the same force of

A metro train, with passengers pulls with the same force of

A truck, reasonably loaded pulls with the same force of

More vehicles

A blue whale pulls with the same force of

An elephant pulls with the same force of

A rhino pulls with the same force of

A hippo pulls with the same force of

A crocodile pulls with the same force of

A lion pulls with the same force of

More animals

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Thank you!