Give two examples of when a machine is used to gain speed.

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Solution

A machine is a device that overcomes a large resistive force at a given point by applying a small force in a convenient direction at a convenient point.
A device is called a machine, If it obtains the gain in speed.
Examples:
To increase the speed, the gear systems are used in automobiles.
To gain speed, propellers are used in an airplane.

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Similar questions

Answer the following questions :

(a) What are simple machines? Give examples.

(b) What are the advantages of using a machine?

(d) What can you use as an inclined plane?

(e) What is meant by a lever?

(f) What is meant by a complex machine? Give an example.

(g) How many types of levers are there? On what basis are they classified?

(h) What should we do to take care of machines?

Name a machine for each of the following use :

(a) to multiply the force,

(b) to change the point of application of force,

(d) to obtain the gain in speed.

Give two examples of when a machine is used to apply the force at a convenient point.

Can a machine change the speed? If yes, give an example.

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