add Applying forces to a ball with mass to showcase

Author: vislupus

content/videos/noc/2-forces/2-mass-and-acceleration/showcase/contribution2.json

@@ -0,0 +1,9 @@
+{
+  "title": "Applying forces to a ball with mass",
+  "author": {
+    "name": "Nikola Bozhinov",
+    "url": "https://github.com/vislupus"
+  },
+  "url": "https://vislupus.github.io/p5-simulations/ball_apply_force_and_mass_mult.html",
+  "submittedOn": "2025-01-10"
+}