What is the mechanical advantage of tackle...

Question 1 of 3104866636ee728f7522a1c518240

What is the mechanical advantage of tackle number 6 as shown in illustration D029DG below?

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Question 1 of 31048

What is the mechanical advantage of tackle number 6 as shown in illustration D029DG below?

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🔍 Key Concepts

• How to determine mechanical advantage by counting the number of parts of line supporting the moving block (the block attached to the weight). • Difference between the standing part of the line and the fall (free) end where the pull is applied. • Recognizing that only the line segments that actually hold up the moving block are counted toward mechanical advantage.

💭 Think About

• Look closely at tackle number 6 and trace the rope from where it is secured (standing part) to the free end where the pull P is applied. How many distinct rope segments are physically lifting the lower block and weight? • Is the free end of the line (where P is applied) attached to the moving block or does it leave from the fixed (upper) block? How does that affect whether you count that segment as supporting the load? • Compare tackle number 6 with one or two of the simpler tackles (like 3 or 4). Can you see the pattern between the number of supporting parts of line and the mechanical advantage for those simpler systems? Use that pattern to reason about #6.

✅ Before You Answer

• Before choosing, count only the line segments that are directly attached to and supporting the lower (moving) block, not the ones that just pass near it. • Verify where the standing part is secured (to the upper or lower block) and from which block the fall (pull) exits; this tells you whether to include or exclude that last segment in your count. • Make sure the mechanical advantage you get is a whole number consistent with the counting rule for tackles (no fractional advantage in this idealized diagram).