Not a question but need a lot of tips More than one answer too

As seen in the image above, that is how my Physics road construction model is supposed to be like. Now that I've drawn a draft, I need some tips on how to actually model it.

What materials I need, how to build it, etc.
I'll award more points ​

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.