A vector is a mathematical construct that has magnitude and direction. The cross product of two vectors is a binary operation in three-dimensional space that results in a third vector that is ...
In the present situation, both Earth and Mars are moving in the same direction around the Sun, but the slower one, Mars, appears to move backwards compared to the faster one, Earth. Just an illusion. The retrograde motion of Mars â like the apparent motion of the slower car on the highway â is nothing more than an illusion.
When youâre lowering your body toward the floor during a pushup, for example, your chest, shoulders and triceps are eccentrically contracting to prevent your body from slamming into the floor, but the force they produce is less than your weight and thus you do continue moving toward the floor.