You can make that assumption, if you intend to check and verify whether or not it is correct. In this case, when you get a larger weight for D, you find that this assumption is incorrect. But if you didn't check, you wouldn't have known which situation was real. Either situation seems possible visually, you have to run the numbers to check and be sure.
Thank you so much, excelent explication, greetings from Costa Rica!
Happy to help. I think you are the first student I've ever had from Costa Rica, thanks so much for leaving a digital post card!
You can’t assume that they are one body, if so the weight you found is larger than the actual maximum weight
You can make that assumption, if you intend to check and verify whether or not it is correct. In this case, when you get a larger weight for D, you find that this assumption is incorrect. But if you didn't check, you wouldn't have known which situation was real. Either situation seems possible visually, you have to run the numbers to check and be sure.
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