What happens when objects collide? Can you use a ramp, a ball, and 10 blocks to design a collision? What happens? 1. Try the experiment. Move the blocks or make a path of blocks to see what happens. 2. Tap the add button. 3. Tap the video button and record your partner rolling the ball down the ramp. 4. At the end of the video, explain what happened. 5. Tap the button to add it to your journal.