My students drop a basketball from a window 5 m over the ground. They are surprised that the fall takes exactly 1 second although they are said the ball gains velocity 10 m/s. After one second of free fall the final velocity is 10 m/s, yet earlier it was smaller, so on average it is only 5 m/s.
It is difficult to see in experiments where exactly the ball is, so I decided to make the animation. Notice that after 0.5 s the covered distance is only 1.25 m, and in the last 0.01 s the ball covers 10 cm, so the final velocity is really 10 m/s.
You see the big ball as though you were moving with it. The small model on the left presents the view from far. At normal speed the animation is 10 times slower than in reality.
I appreciate Sketchfab very much, yet in this case I am not fully satisfied. The model of stopwatch does not work precisely. In Blender it was accurate.
The ball was made by HQ3DMOD: https://sketchfab.com/3d-models/basketball-classic-standard-ball-39d0e28487d2426bb9c24010dcfc4808
CC AttributionCreative Commons Attribution
Comments