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Express 15 M S-1 in Km H-1. - Physics

Sum

Express 15 m s-1 in km h-1.

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Solution

1 metre = `1/1000` km 

15 metre  = `15/1000` km 

1 second  = `1/3600` hr 

Here , Distance  = `15/1000` km 

Time taken = `1/3600` hr . 

Speed = `"Distance"/ "Time taken" `

         = `(15/1000)/(1/3600)`

         = `15/1000 × 3600/1`

         = 54 km `"h"^-1` 

Concept: Concept of Physical Quantities and Units
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APPEARS IN

Selina Concise Physics Class 7 ICSE
Chapter 1 Physical Quantities and Measurement
Numericals | Q 18
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