another way to describe a position is as the path taken from the origin—point (0, 0)—to the current point. When you think of position in this way, it becomes a vector, just like velocity, as in Figure 1.4. <picture><source type="image/webp" srcSet="/static/797d06eafb90cdebf68c1301ff876f6c/caff3/01_vectors_5.webp 576w,/static/797d06eafb90cdebf68c1301ff876f6c/0f313/01_vectors_5.webp 1152w,/static/797d06eafb90cdebf68c1301ff876f6c/c86c1/01_vectors_5.webp 2304w" sizes="(min-width: 2304px) 2304px, 100vw"/><img data-gatsby-image-ssr="" data-main-image="" style="object-fit:contain;opacity:0" sizes="(min-width: 2304px) 2304px, 100vw" decoding="async" loading="lazy" src="/static/797d06eafb90cdebf68c1301ff876f6c/694e8/01_vectors_5.png" srcSet="/static/797d06eafb90cdebf68c1301ff876f6c/6c4c7/01_vectors_5.png 576w,/static/797d06eafb90cdebf68c1301ff876f6c/d1c40/01_vectors_5.png 1152w,/static/797d06eafb90cdebf68c1301ff876f6c/694e8/01_vectors_5.png 2304w" alt="Figure 1.4: A computer graphics window with (0, 0) in the top left, showing a position vector and a velocity vector"/></picture>const t="undefined"!=typeof HTMLImageElement&&"loading"in HTMLImageElement.prototype;if(t){const t=document.querySelectorAll("img[data-main-image]");for(let e of t){e.dataset.src&&(e.setAttribute("src",e.dataset.src),e.removeAttribute("data-src")),e.dataset.srcset&&(e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset"));const t=e.parentNode.querySelectorAll("source[data-srcset]");for(let e of t)e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset");e.complete&&(e.style.opacity=1,e.parentNode.parentNode.querySelector("[data-placeholder-image]").style.opacity=0)}} Figure 1.4: A computer graphics window with (0, 0) in the top left, showing a position vector and a velocity vector In Figure 1.4, the vectors are placed on a computer graphics canvas. Unlike in Figure 1.2, the origin point (0, 0) isn’t at the center; it’s at the top-left corner. And instead of north, south, east, and west, there are positive and negative directions along the x- and y-axes (with y pointing down in the positive direction).
great way to describe position as a vector