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Question
What are the wheel and axle? Give two examples.
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Solution
The wheel and axle is a simple machine having a wheel and an axle. The linear motion of the axle is obtained by rotating the wheel so as to reduce friction.
Example: Steering wheel, screwdrivers, water tap, etc.
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Doorknob
Select the correct statement :
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(f) A screw is made by two inclined planes placed together.
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| 2. | Pulley | Bicycle |
| 3. | Class I lever | Nut cracker |
| 4. | Wheel and axle | Wind |
| 5. | Renewable resource | Seesaw |
