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प्रश्न
Select the correct alternative:
Wheel is used with axle because
पर्याय
sliding friction is less than the roffing friction
rolling friction is less than the sliding friction
they work as the inclined plane
They help us to change the direction of force.
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उत्तर
rolling friction is less than the sliding friction
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संबंधित प्रश्न
What are the wheel and axle? Give two examples.
How does a wheel help in moving the axle?
Name the machine to which the following belong:
Doorknob
Select the correct statement :
(a) A wheel barrow is a lever of class I.
(b) The efficiency of a machine is always 100%
(c) Friction in moving parts of a machine reduces its efficiency.
(d) No lever has the mechanical advantage greater than 1.
(e) It is easier to lift a load vertically up than to push it along an inclined plane.
(f) A screw is made by two inclined planes placed together.
State if the following statement is true or false. Correct the statement if it is false.
A rotation spindle tap is an example of a wheel-and-axle arrangement.
Match.
| 1. | Class II lever | Drawing water |
| 2. | Pulley | Bicycle |
| 3. | Class I lever | Nut cracker |
| 4. | Wheel and axle | Wind |
| 5. | Renewable resource | Seesaw |
