Xi Bin's answer to Niayui's Junior College 1 H3 Maths question.
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Date Posted:
6 years ago
How you get N2= 0.575 , is the total N is 9.8 ? Why ?
We need to set O as the pivot, there will be a torque on the rod. W1=0.2g, W2=0.3g, W3=0.5g. Refer to the equation, we can find N2=1/3xW2+1/2xW1+3/4xW3, substitute W in you will get N2. Think this whole system as one object, Total N=Total Weight=weight of rod + W2+W3. So we can find N1=weight of the whole system - N2.
We set the left supporting point as pivot, the right side will become rotation side.
Total N should be 9.8 (Newton).
We set the left supporting point as pivot, the right side will become rotation side.
Total N should be 9.8 (Newton).
Well, thank you for your downvote. Good luck with your A level. Bless you.
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