Question

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

1. muscular force 

2. wheels 

3. Wheel 

4. second 

5. pulley