🔍 Key Concepts

• Gun tackle mechanical advantage when rigged to advantage vs. rigged to disadvantage • How to compute mechanical advantage (MA) from number of parts of line supporting the moving block • Relationship between mechanical advantage, load, and effort: Effort = Load ÷ MA (ignoring friction)

💭 Think About

• Sketch a simple gun tackle and identify which block is moving and which is fixed when rigged to disadvantage • Count how many rope segments are actually supporting the moving block in this configuration • Once you know the mechanical advantage, divide the 200 lb load by that number to find the required effort

✅ Before You Answer

• Be sure you are using the rigged to disadvantage layout, not the rigged to advantage layout • Confirm you only count the parts of line supporting the moving block, not the standing or hauling ends if they don't support it • Double-check that Effort × MA = Load (ignoring friction) for your chosen answer