Try it on paper first. A hint, the key idea and the worked solution are here when you need them.
Two school bags of and are apart. Find the pull of gravity between them, and compare it with the weight of the lighter bag. ()
The law of gravitation: , with and the distance between the centres. The Earth: , .
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. Pull. .
Step 2. Weight. .
Step 3. Compare. The weight is about times as big.
Answer: , far too small to notice beside the weight.
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