Cual es el valor de la fuerza normal ejercida por una superficie plana en un objeto de 500g?

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<img src="https://tex.z-dn.net/?f=m%3D0%2C5kg%20%5C%5C%20g%3D9%2C8m%2Fs%5C%C2%B2~~---%5C%20%5Ctextgreater%20%5C%20gravedad%20%5C%5C%20Se~sabe~que~el~peso~es~igual%3A%20%5C%5C%20%5Cboxed%7B%20P%3Dmg%7D%20%5C%5C%20Reemplazando~los~datos~para~calcular~el~peso~tenemos%3A%20%5C%5C%20P%3D0%2C5kg.9%2C8m%2Fs%5C%C2%B2%20%5C%5C%20P%3D4%2C9%5Cunderbrace%7Bkg.m%2Fs%5C%C2%B2%7D_%7BN%7D%20%5C%5C%20%5Cboxed%7B%5Cboxed%7BP%3D4%2C9N%7D%7D~~--%5C%20%5Ctextgreater%20%5C%20valor~del~peso%20%5C%5C%20%20%5C%5C%20Ahora~respondiendo~la~pregunta%20%5C%5C%20%20%5C%5C%20De%20~la~figura~vemos~que~no~hay~aceleraci%5Cacute%7Bo%7Dn~por~tanto~aceleraci%5Cacute%7Bo%7Dn%20%5C%5C%20es~cero." />

<img src="https://tex.z-dn.net/?f=Entonces~decimos%20que%3A%20%5C%5C%20%5Csum%7B%7D_F%3Dm.a~~~--%5C%20%5Ctextgreater%20%5C%20como%5Ba%3D0%5D%2C%20tenemos%3A%20%5C%5C%20%5Csum%7B_F%7D%3D0%20%5C%5C%20N-P%3D0%20%5C%5C%20N%3DP~~--%5C%20%5Ctextgreater%20%5C%20sabemos~que~%5BP%3D4%2C9N%5D%2Creemplzando~seria%3A%20%5C%5C%20%5Cboxed%7B%5Cboxed%7B%5Cunderbrace%7BN%7D_%7BNormal%7D%3D4%2C9%5Cmathbf%7BN%7D%7D%7D---%5C%20%5Ctextgreater%20%5C%20el~valor~de~la~fuerza~normal" /> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Espero te sirva, saludos!