The nice thing about the example of a bike is – as said – all its engineering principles are on show, a car is just as ubiquitous but all the workings are hidden – so a drawing of a bike is really a drawing of your understanding of a bike – where a drawing of a car is just a representation of the superficial aspects of a car
ask them to draw a car with a level of detail to include doors and windows (physical moving parts that they will interact with) and I think just as many people will fall down.
on bikes, it depends on what you would call a passable drawing. A double diamond that fits wheels, has cracks and a drive train that is in the right place?
My first proper MTB was an Orange crush, 2011; so quite an easy one. Lord knows how you post your own picture on here though.
Correct – double diamond frame, head angle slacker than the seat, front to rear centre about right, 2 wheels of the same size, cranks, drivetrain.
Incorrect – its either a 24 incher, or has a 1600 wheelbase; and seems to have a 12 inch travel fork. Even with the saddle slammed to the frame, its barely below the bars.