SLOPING SLIDES v 1.0 Team Up Please find your partners and - PowerPoint PPT Presentation

科 技 體 驗 Scientific experiment 程 式 化 控 制 器 F O R C E A N D S I M P L E M A C H I N E Session 11 SLOPING SLIDES v 1.0

Team Up Please find your partners and accomplish the activities cooperatively.

Story Time Gigi got a big surprise this winter, her family arranged a parent-child skiing trip. It was the first time Gigi had seen snow in person, she was very excited. Gigi put on her skiing equipment and took the cable car up the hill. She looked down on the mountain as the cable car gradually rose into the air, she was impressed by the white, snowy world.

Story Time When she arrived at the ski course, she was ready for her first skiing adventure. In the beginning, Gigi didn’t know how to ski, and she frequently lost control. She was screaming all the way down and then finally fell at the bottom. The coach told Gigi , “The skiing field is like a steep slope, any objects on it slide down, unless there is an external force to make it stop.” After this explanation and some more instruction, Gigi learnt how to ski properly.

Daily Application An inclined plane is a typical simple mechanical structure. It is an inclined flat plank capable of lifting an object less strenuously from a low area to a high area. The length of the route required to lift the object also increases. By using an inclined plane, for example, one can easily load or unload goods onto or off a freight truck. The smaller the gradient of the inclined plane, the smaller the angle between the inclined plane and the horizontal plane. The force required to be applied to the object is lesser and the moving distance is longer. On the contrary, when the angle between the inclined plane and the horizontal plane increases, the force applied to move the object has to be increased. T he moving distance shortens.

Brainstorming What other applications does an inclined plan have?

Parts List Please find the parts according to the photo below. Check again that you acquire the same number of parts.

Sloping Slides

Assembly Steps

Assembly Steps

Assembly Steps

Assembly Steps

Assembly Steps

Assembly Steps

Hands-on Experiment Let’s do it: Put a marble on the top of the steep slope then release it, observe what’s going to happen when it falls onto the second layer, and try to adjust its angle or the length of the slope.

Hands-on Creativity Give it a try, without affecting the falling rate of the marble, combine other designs with your slide.

Evaluation Let’s score yourself. How many stars do you get today? Model Assembled Good job! You can get the 1 st star when you complete the assembly. Experiment Complete Accomplish the experiment and get the 2 nd star. Model Creation Excellent! You make your own creation and get the 3 rd star.