A beam balance and a spring balance are taken to the Moon…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A beam balance and a spring balance are taken to the Moon. A bag sits on each. On the Earth both show the bag as (the spring balance is marked in kg using ). What does each show on the Moon, where ?
Need a reminder? The key ideaShow
Mass () is how much matter, the same everywhere. Weight () is the pull of gravity: . On the Moon (more exactly ); on Jupiter .
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.
Step 1. Beam balance. It compares the bag with standard masses, and both are pulled less in the same way: .
Step 2. Spring balance. The pull is ; marked for the Earth, it shows .
Answer: Beam balance ; spring balance . Only the beam balance shows the true mass.
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