You are using tackle number 4 as shown in...

Question 1 of 2921866636ee728f7522a1c518e8d

You are using tackle number 4 as shown in illustration D029DG below to lift a weight. The hauling part of this tackle is bent to the weight hook (w) of tackle number 10. What is the mechanical advantage of this rig?

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Question 1 of 29218

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🔍 Key Concepts

• Count how many parts of the line support the moving block in tackle #4. • Count how many parts of the line support the moving block in tackle #10. • For a compound tackle, the overall mechanical advantage equals the product of the individual mechanical advantages (MA₁ × MA₂).

💭 Think About

• Look closely at illustration #4: how many separate rope segments are actually holding up the lower block attached to the weight? • Do the same for illustration #10: how many rope segments support its lower block? • Once you have the two individual mechanical advantages, how does connecting the hauling part of tackle #4 to the hook (w) of tackle #10 change the total force multiplication?

✅ Before You Answer

• Be sure you only count the rope segments that are directly supporting the moving block, not those attached to a fixed point. • Confirm whether the hauling part is attached to the fixed or moving block in each tackle; this affects whether it is counted in the mechanical advantage. • After finding MA for each tackle separately, multiply them for the compound system and check which answer choice matches that product.