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प्रश्न
Name six simple machines. Give an example of each machine.
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उत्तर
Simple Machines and their examples are as follows:
- The lever: Examples are a crowbar, claw hammer, a pair of pliers, etc.
- The Inclined plane: Examples are ramp, staircase, hilly roads, etc.
- The wedge: Examples are knife, axe, plough, nail, etc.
- Screw: Examples are A screw.
- The wheel and axle: Examples are steering wheel of a car, bicycle pedal, etc.
- The pulley: Examples are a pulley used in raising a load.
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संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
Select the correct alternative:
For an ideal machine, the efficiency is
Define the term ‘work input’ and ‘work output’ in relation to a machine.
A machine is 75% efficient’. What do you understand by this statement?
Give scientific reason for the following:
Passengers in a bus are pushed backward when it starts suddenly.
Give an example of the following use of a machine to change the direction of force.
Classify the following as a lever, a pulley and an inclined plane:
A wedge
Classify the following as a lever, a pulley and an inclined plane:
A staircase
Classify the following as a lever, a pulley and an inclined plane:
The wheel of a flagpole
Classify the following as a lever, a pulley and an inclined plane:
A crane
