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Find the weight to balance the scales.[img]2012q2/ct_eyyjscz2007a_eyyjsciq_0095
Find the weight to balance the scales.[img]2012q2/ct_eyyjscz2007a_eyyjsciq_0095
游客
2023-10-19
56
管理
问题
Find the weight to balance the scales.
选项
A、2kg.
B、4kg.
C、3kg.
D、5kg
答案
A
解析
物理学杠杆平衡原理,两边力乘以力矩得出的积相加之和相等。4 kg×3+16 kg×1=10 kg×2+X×40,X=2 kg。
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