![]() ![]() Present to the class the Introduction/Motivation content.The slides are animated so a mouse or keyboard click brings up the next image, text or slide. Prepare to project the Spatial Visualization Presentation, a PowerPoint® file, and use its content to aid in your instruction, as makes sense for your class.Gather materials and make copies of the Blank Triangle-Dot Paper and Let’s Rotate Worksheet.To rotate this block, which way would we point our thumbs? (Answer: Towards us.) So, this is a positive rotation. ![]() When we point our right thumbs along the z-axis to rotate this object, we can point towards ourselves (you can remember this by thinking “towards the zippers on our clothes”) or away from us. Let’s look back at our example (slide 22). Notice that your thumb is now along the negative y-axis and your fingers are rotating clockwise. ![]() The axes shown in the previous slide (slide 23) are the positive axes, and if you flip the axis 180 degrees, you get the negative axes.Įveryone: Give your neighbor a thumbs up! Notice that your thumb is along the positive y-axis and your other fingers are rotating counter-clockwise. Your fingers will move in the same way the object will move. The right-hand rule works as follows: point your thumb parallel to the axis you are rotating about and curve your fingers naturally towards the palm of your hand. The right-hand rule is often used in physics and math to calculate vectors and rotations of objects. Now we need to define the difference between a positive and a negative rotation with the right-hand rule (show slide 24). ![]() Can you find the rotation of the gray object that is analogous to the rotation of the white object?Ĭopyright © 2016 Jacob Segil, College of Engineering and Applied Science, University of Colorado Boulder We’ll start out rotating about one-axis.įigure 1. Objects can be rotated about the three axes-x, y and z-and any combination of the three. In this activity, we are going to rotate both isometric drawings and blocks-very similarly to what you did on the Spatial Visualization Practice Quiz at the beginning of the associated lesson. For example, how do you know which direction to put a key in a lock? How do you organize your locker so that you can fit in more books? These tasks require the ability to visualize the one-dimensional rotations of objects. We use object rotation to understand the world around us-what objects are and how they fit together. (Have the slide presentation up and displayed to the class, starting with slide 21.) Today we are going to learn about rotations! Rotating objects is an essential skill in the engineering world and it’s something we most likely already do every day.
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