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प्रश्न
Why is this so traveller’s bags have wheels?
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उत्तर
A traveler's bag has wheels so that it can be dragged easily because of reduced friction between the ground and the wheel. Thus, the wheel, a simple machine, helps to decrease the effort to be applied to the load, which is a bag here.
संबंधित प्रश्न
What do you understand by a machine?
Name six simple machines. Give an example of each machine.
Answer the following in short.
Mention any two methods by which we can take care of machines.
Give a reason for the following.
Machines are able to make our work convenient.
What is an inclined plane?
Define mechanical advantage (M.A.) of the machine.
What is the relationship between the mechanical advantage and the velocity ratio for:
(i) An ideal machine,
(ii) A practical machine.
Classify the following as a lever, a pulley and an inclined plane:
A needle
What is a lever?
Name some simple machines.
