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Fill in the Blanks 1. For operation of simple machines we use …………….. . 2. ……………. is one of the first inventions by humans. 3. …………… and axle are also simple machines. 4. A pushing wheel is a ……………… type of lever. 5. …………… is a small type of wheel. |
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Answer» 1. muscular force 2. wheels 3. Wheel 4. second 5. pulley |
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