Advertisements
Advertisements
प्रश्न
State four ways in which machines are useful to us.
उत्तर
Machines are useful to us in the following ways:
- In lifting a heavy load by applying less effort.
- In changing the point of application of effort to a convenient point.
- In changing the direction of effort in a convenient direction.
- For obtaining a gain in speed.
APPEARS IN
संबंधित प्रश्न
With reference to the terms Mechanical Advantage, Velocity Ratio and efficiency of a machine, name and define the term that will not change for the machine of a given design.
A scissor is a _________ multiplier
Draw a diagram to show how a single pulley can be used so as to have its ideal M.A= 2.
Name a machine to change the point of application of force ?
Mechanical advantage (M.A.), load (L) and effort (E) are related as ______.
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?
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.
Complete the following sentence :
Mechanical advantage = ___________ × velocity ratio
Complete the following sentence :
A scissors is a ___________ multiplier.
Mention the advantages of using a machine.
