Double clicking the area around the graph lets you access its settings here, you can add a second, third or fourth trace. I add two dropdown controls, and drag their target symbols onto each ground they let me choose the gravity setting. Yenka’s presentation folder lets you add controls and measuring tools to your screen. To duplicate this setup precisely, I simply click the right mouse button on the border, and click copy, and then paste. The ground exerts a gravitational attraction on the ball. In the space, I’ve placed a ball and a ground. (And note - I’m using last week’s tip: setting up the experiment with the pause button switched on, so that I can set things running when I want to.) I start by dragging a “space” onto the screen - a self-contained area which allows you to vary the laws of physics within the confines of your monitor. Here, I want to look at how the same ball would bounce on the earth and the moon. Often, though, it’s useful to compare two traces on the same graph. Yenka Science’s graphing tools are helpful when you want to follow what’s happening in your simulation.
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