- #1
amurray
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Hello All,
I am helping my 3rd grade nephew on a science project. I am trying to decide what the expected results would be & why. The project is run of track that is inclined at both ends w/ a 30" straight run in the middle. The ends are 3" high at 30 degrees. He is releasing different size balls (golf, 1" plastic & marble) down the incline at one end. Then along the straight track and measuring how far up the incline on the other end the ball rolls. After five trials of each ball they all went the same distance up the incline.
I know the math and physics behind this is way above 3rd grade, but want to understand it for myself and then give him a basic explanation of what is going on. I broke out my college physics books but was not able to puzzle through it.
Any help is greatly appreciated. If I should post this to another forum I aplologize.
Andy Murray
I am helping my 3rd grade nephew on a science project. I am trying to decide what the expected results would be & why. The project is run of track that is inclined at both ends w/ a 30" straight run in the middle. The ends are 3" high at 30 degrees. He is releasing different size balls (golf, 1" plastic & marble) down the incline at one end. Then along the straight track and measuring how far up the incline on the other end the ball rolls. After five trials of each ball they all went the same distance up the incline.
I know the math and physics behind this is way above 3rd grade, but want to understand it for myself and then give him a basic explanation of what is going on. I broke out my college physics books but was not able to puzzle through it.
Any help is greatly appreciated. If I should post this to another forum I aplologize.
Andy Murray