What situation will provide more friction? You pushing a heavy box that is moving

Not moving the box

You pushing a heavy box that is not moving

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

How do you know how many valence electrons an atom has?

What is "decrease in velocity" i need offering 60 !