What is the mechanical advantage of tackle...

Question 1 of 3104866636ee728f7522a1c51813e

What is the mechanical advantage of tackle number 1 as shown in illustration D029DG below?

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Question 1 of 31048

What is the mechanical advantage of tackle number 1 as shown in illustration D029DG below?

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🔍 Key Concepts

• Mechanical advantage (MA) of a tackle is equal to the number of parts of line supporting the moving load (ignoring friction). • Difference between a fixed pulley and a moving pulley and how each affects mechanical advantage. • How the line is anchored (becket/dead end) and which parts of the line are actually lifting the weight W in tackle #1.

💭 Think About

• Look closely at tackle #1 and trace the rope from where it is secured to where you pull. How many segments of rope are directly supporting the weight W? • Ask yourself: does this arrangement only change the direction of the pull, or does it actually multiply the force? • Compare tackle #1 with one of the other tackles in the figure that clearly has multiple supporting parts. How does the number of rope segments on the moving block differ?

✅ Before You Answer

• Carefully count only the rope parts that are attached to or pass over the weight (moving load), not the free end you pull on when it’s not attached to the load. • Confirm whether the single sheave (pulley) in tackle #1 is fixed to the overhead or moves with the weight—this determines if you get any force multiplication. • Before choosing, verify that your MA value makes sense: if there is one supporting line the MA should be 1.0; if there are two supporting lines, MA should be 2.0, etc., ignoring friction.