What are the variables called that are kept the
same?

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

What happens when a rubber rod is rubbed with a piece of fur?