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प्रश्न
What is a machine?
उत्तर
A machine is a device by which we can overcome resistance by applying a comparatively small force at a convenient point and in the desired direction or obtain a gain in speed.
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संबंधित प्रश्न
Draw a diagram to show how a single pulley can be used so as to have its ideal M.A= 2.
State four ways in which machines are useful to us.
State the incorrect statement:
A force of 5 kgf is required to cut a metal sheet. A pair of shears used for cutting the metal sheet has its blades 5 cm long, while its handles is 10 cm long. What effort is needed to cut the sheet?
Name a machine which is used to multiply speed ?
The diagram below shows a claw hammer used to remove a nail :
(i) To which class of lever does it belong ?
(ii) Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one.
Stat the principle of an ideal machine.
Shows a lemon crusher.
- In the diagram, mark the position of the fulcrum F and the line of action of load L and effort E.
- Name the class of lever
Complete the following sentence :
Mechanical advantage = ___________ × velocity ratio
Mention the advantages of using a machine.
