Some interesting thing asked during a SIA interview

What is the difference between Speed and Velocity?

Speed as you know is Distance moved per unit of time. Example like km/h, m/s, knots (nautical miles per hour) or Mach (Speed of sound 343 m/s or 1235 km/h)

Whereas for velocity, it is speed in a particular direction. As velocity is defined as a vector, therefore you need speed and direction to define it. So the average velocity of an object moving a distance during a time intveral in a straight line is:

V(velocity)= D(distance)/T(time)

Hope this helps.