The car is the heaviest object there and mass is proportional to force, meaning the heavier it is the bigger the force should be in order to move it.
B- Back into it's original medium.
Hope this helps!
Step 1 : Get your supply list together
Step 2 : Pick what model you want to do
Step 3 : Ask for a partner
Step 4 : Complete the model and take your time.
Step 5 : Read the directions carefully