043, friction (ask for recommendation and collection)

“...... The universe is the general term for all things, the unity of time and space. Pen × fun × Pavilion www. biquge。 The info universe is a material world, which does not depend on human will and exists objectively, and is in constant motion and development, with no beginning and no end in time, no boundary and no end in space. The universe is diverse and unified, and the diversity of diversity in the state of material expression lies in its materiality. The universe is a unity composed of space, time, matter, and energy.

“...... From a certain point of view, the mass of the object will increase with the increase of the speed of the object (mass-velocity relationship), and at the same time, space and time will also change with the change of the speed of the object, that is, the size shrinkage effect and the clock slow effect will occur.