Conversion of Units


 
 
Concept Explanation
 

Conversion of Units

Conversion Of Units:

The basic unit of time is second (s). The other units are minute and hour.

Since the speed is given by

Speed= frac{distance}{time} ,

The unit is meter per second (m;s^{-1}). However, it can also be expressed as meter per minute (m;min^{-1}) or kilometer per hour (km;h^{-1})

Depending on the situation, different units of time are used. For example, the age of a person is expressed in years but not in minutes or hours. The time taken to go from one place to another by an aeroplane can be expressed in minutes and hours but not in months and years.

(i);1m/s=frac{1/1000;km}{1/3600;hr}

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Sample Questions
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Question : 1

Express: 3m as ___________mm and 5km as ________cm.

Right Option : A
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Question : 2

20;m; s^{-1}=___________________ Km;h^{-1}

Right Option : B
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Question : 3

A car moves at 80 km/hr.what is the speed of the car in meters per second.

Right Option : B
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Explanation
 
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