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प्रश्न
State four ways in which machines are useful to us.
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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.
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संबंधित प्रश्न
A scissor is a _________ multiplier
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?
What is the purpose of a machine?
Give an example for each of the following uses of a machine:
to obtain gain in force,
Work is the application of a ....... through a distance.
Complete the following sentence :
Mechanical advantage = ___________ × velocity ratio
Complete the following sentence :
A scissors is a ___________ multiplier.
Name a machine which can be used to multiply force and change the direction of force applied.
