Units and Measurements — Physics STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 SciencePhysicsUnits and Measurements1 Mark
Question
Fill in the blanks: A vehicle moving with a speed of $18 \mathrm{~km} \mathrm{~h}^{-1}$ covers .... m in 1 s
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Answer
A vehicle moving with a speed of $18 \mathrm{~km} \mathrm{~h}^{-1}$ covers $\mathbf{5 m}$ in 1 s .
Using the conversion, Given, Time, $\mathrm{t}=1 \mathrm{sec}$ speed $=$ $18 \mathrm{~km} \mathrm{~h}^{-1}=18 \mathrm{~km} /$ hour $1 \mathrm{~km}=1000 \mathrm{~m}$ and 1 hour $=3600 \mathrm{sec}$ Speed $=18 \times 1000 / 3600 \mathrm{sec}=5 \mathrm{~m} / \mathrm{sec}$ Use formula
Speed $=$ distance/time Cross multiply it, we get Distance $=$ Speed $\times$ Time $=5 \times 1=5 \mathrm{~m}$
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