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𝐼 =𝑃𝑜𝑡𝑇𝑜𝑡𝑎𝑙
𝐴
𝑃𝑜𝑡𝑇𝑜𝑡𝑎𝑙 = 𝐼. 𝐴 = 1000 𝑥 9,0 = 9,0 𝑥 10³ 𝑊
𝜂 =𝑃𝑜𝑡Ú𝑡𝑖𝑙
𝑃𝑜𝑡𝑇𝑜𝑡𝑎𝑙
𝑃𝑜𝑡Ú𝑡𝑖𝑙 = 𝜂. 𝑃𝑜𝑡𝑇𝑜𝑡𝑎𝑙 = 0,30 𝑥 9,0 𝑥 10³ = 2,7 𝑥 10³ 𝑊
𝜏𝑇𝑜𝑡𝑎𝑙 = 𝛥𝐸𝑐𝑖𝑛 =𝑚
2(𝑉2 − 𝑉0
2)
𝜏𝑇𝑜𝑡𝑎𝑙 =200
2𝑥 (30)2 = 9,0 𝑥 104 𝐽
𝑃𝑜𝑡Ú𝑡𝑖𝑙 =𝜏𝑇𝑜𝑡𝑎𝑙
𝛥𝑡
𝛥𝑡 =𝜏𝑇𝑜𝑡𝑎𝑙
𝑃𝑜𝑡Ú𝑡𝑖𝑙
= 9,0 𝑥104
2,7𝑥 103 = 33𝑠
ω
ω
ω ω
𝑣1 = 𝑣2
𝜔2 = 𝜔3
𝑣1 = 𝑣2 = 𝜔2𝑅2 → 𝜔2 =𝑣1
𝑅 2
𝑣3 = 𝜔2𝑅3
𝑣3 = 𝑣1𝑅3/𝑅2
𝑣1 = 𝑣3
𝜔2 = 𝜔3
𝑣1 = 𝑣3 = 𝜔3𝑅3 → 𝜔3 =𝑣1
𝑅 3
𝑣2 = 𝜔3𝑅2
𝑣2 = 𝑣1𝑅2/𝑅3
𝑅2 < 𝑅3
𝑇 = 2 𝜋 √(𝐿/𝑔)
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