Question

Express each of the following in SI unit – 

(i) 14 pound per inch² 

(ii) 200 mile per hour 

(iii) 5 feet 2 inch

Answer 1

(i) 1 pound per inch² = 6894.76 Nm^–2

^{\(\therefore\)} 14 pound per inch² = 6894.76 × 14

= 96526.64 N/m²

(ii) 1 mile/hr = \(\frac{1.6\times10^3m}{3600\,s}\)

= 0.444 m/sec

\(\therefore\) 200 mile/hr = 200 × 0.444

= 88.8 m/sec

(iii) 1 m = 39.37 inch 

1 feet = 12 inch 

5 feet 2 inch = 5 × 12 + 2 inch

= 60 + 2 = 62 inch

\(\therefore\) 5 feet 2 inch = \(\frac{62}{39.37}\) = 1.5748 m