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An astronaut has a mass of 85 kg. Take g = 9.8 m/s² on the Earth and g = 1.62 m/s² on the Moon.

Try it on paper first. A hint, the key idea and the worked solution are here when you need them.

An astronaut has a mass of $85\ \text{kg}$ . Take $g = 9.8\ \text{m/s}^2$ on the Earth and $g = 1.62\ \text{m/s}^2$ on the Moon.

What is the astronaut's weight on the Earth?
The astronaut's mass on the Moon?
The weight on the Moon?

Need a reminder? The key ideaShow

Mass ( $\text{kg}$ ) is how much matter, the same everywhere. Weight ( $\text{N}$ ) is the pull of gravity: $W = mg$ . On the Moon $g = 1.6\ \text{m/s}^2$ (more exactly $1.62\ \text{m/s}^2$ ); on Jupiter $24.8\ \text{m/s}^2$ .

The worked solution

Have you tried it?

Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.

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