1.

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.

Answer»

1. muscular force 

2. wheels 

3. Wheel 

4. second 

5. pulley



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