Give two reasons why the efficiency of a single movable pulley is not $100 %$ .

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Solution

1. The moving parts are not perfectly smooth or not frictionless.

2. The string used is not perfectly elastic.

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Give two reasons why the efficiency of a single movable pulley is not 100%.

1. The moving parts are not perfectly smooth or not frictionless. 2. The string used is not perfectly elastic.

Give two reasons why the efficiency of a single movable pulley is not $100 %$ .

1. The moving parts are not perfectly smooth or not frictionless.

2. The string used is not perfectly elastic.