Q. The concorde is the fastest airlines used for commercial service. It can cruise at 1450 mile per hour (about two times the speed of sound or in other words mach 2). What is it in m/s?
A) 644.4m/s
B) 80 m/s
C) 40 m/s
D) None of these
Explanation
$n_{1}u_{1} = n_{2}u_{2}$ $n_{2} = \frac{n_{1}u_{1}}{u_{2}}$ $= \frac{1450mile/h}{m/s} = \frac{1450\ s/mile}{mh}$ $= \frac{1450\ s \times 1.6km}{10^{- 3}km\ 60 \times 60s} = 644.4$ 1450 mile/h=644.4m/s
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.