Hello there, I know this may seem basic physics but I would be interested in how to calculate various things concerning force output on the ground when I, a machine or an object pushes another. A few examples, a machine, lets say a large digger sort of contraption is pushing 100 tons of metal to a construction site, how much force does it exert on the ground? I am also curious, how would one calculate how much force would be required to damage the ground? lets say this vehicle is travelling over a perfectly smooth surface of granite or steel (does not matter) how would you calculate the force that surface can take before cracking, shattering etc? Is it compressive strength, tensile strength or something else in materials? Finally, the same question goes for a human or something of that shape (a humanoid machine like a big Asimo?) pushing a very large object like a metal cube weighing in the double to triple digit tons, I am interested in knowing how much force would be acting as pressure on the ground from it pushing this object along a flat surface. Thank you for any answers or aid.