https://padlet.com/MrsDove/c74tlxxx4if6 Share your 2nd engine and review your classmate's 2nd engine. en-us 2019-09-08 17:41:42 UTC 2026-01-21 22:20:43 UTC hello@padlet.com https://padlet.pics/1/image.webp?t=g_auto&url=https%3A%2F%2Fpadlet.net%2Ficons%2Fpng%2F1f6e2.png MrsDove https://padlet.com/MrsDove/c74tlxxx4if6/wish/381334779

Post the video of your 2nd engine (if the video won’t post, then use a picture) 

On your post, explain the following:

1. Explain the variable you changed from the first engine to the second engine
2. Explain the evidence that shows the effect of the variable that was changed. 
3. Explain how this change demonstrates something about Newton’s Third Law of Motion

Review other student's posts and answer the question on the "MOST EFFECTIVE" post by making a comment in that post.

]]> 2019-09-08 17:44:02 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/381334779 MrsDove https://padlet.com/MrsDove/c74tlxxx4if6/wish/381335104 After reviewing your peers' 2nd engines,  what style of engine
seemed to be the most effective? Why? 

Answer by making a comment below.]]> 2019-09-08 17:46:01 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/381335104 zoeyf4757 https://padlet.com/MrsDove/c74tlxxx4if6/wish/382854425 I decided to change the number of holes to see how it would affect the speed and number of times the can rotated. This did affect the rate at which the can spun. It began to go slower and only spun around 4 times while the other can spun nearly 6 times and at a much faster rate. This demonstrates Newtons Third Law of Motion because the action (can with water in it being lifted out) there is an equal or opposite reaction (water coming out of the sides propelling it in a circle)]]> 2019-09-11 17:07:46 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/382854425 macyd0482 https://padlet.com/MrsDove/c74tlxxx4if6/wish/382986882 I thought that maybe adding less holes would make it more effective since i couldn't think of anything else to change. It was nearly the same. The one with 2 holes spun around 6 times and the one with 4 holes spun 7. The reason why the one with 4 holes spun more is because the water was evenly coming out and propelling the can in a circle. ]]> 2019-09-11 21:26:55 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/382986882 macyd0482 https://padlet.com/MrsDove/c74tlxxx4if6/wish/382991231 my first model was most effective. ]]> 2019-09-11 21:43:47 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/382991231 amandad0042 https://padlet.com/MrsDove/c74tlxxx4if6/wish/383453129 My second model engine was more efficient that the first.  I changed the amount of holes I added. On my first model, I made four holes, on my second model, I made eight holes. These changes made the can spin lots faster. My engine showed the force of water against the holes and how it made the can push in circle.  ]]> 2019-09-12 18:20:02 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/383453129 matthewm1877 https://padlet.com/MrsDove/c74tlxxx4if6/wish/383549255 2019-09-12 22:38:17 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/383549255 michaelb0014 https://padlet.com/MrsDove/c74tlxxx4if6/wish/383569129 In my second engine, I expanded the hole size, giving it more acceleration. However, since the hole was larger, it gave the can less time to spin around, but it kept it's momentum even after the can was empty, which proves that it spun faster than my original model, but with two times less rotation. The force of the water pushes the can in the opposite direction.]]> 2019-09-13 00:19:25 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/383569129 elliotk0032 https://padlet.com/MrsDove/c74tlxxx4if6/wish/383601022 For my second engine I didn't really change the can because I didn't really see anything wrong with it. Instead I experimented by changing the yarn into floss. The floss had less resistance and friction making the engine work more efficiently. While using the first engine it spun 6 times. The second engine had less resistance so it spun 32 times.]]> 2019-09-13 02:40:43 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/383601022 isabellas2678 https://padlet.com/MrsDove/c74tlxxx4if6/wish/383638102 My second engine worked better because my first can had four small holes. In my second model I more holes but the same size and made it spin faster and longer. The first model it spun a 3 times the second time it spun twice that. ]]> 2019-09-13 06:52:55 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/383638102 JelloForever https://padlet.com/MrsDove/c74tlxxx4if6/wish/383950084 My second engine was far less efficient than my first. It literally turned 1 1/2 times, and I still don't really know why I made the changes I did. I decided to put my holes halfway up on my can, just to see what it would do. It didn't work. My original worked better and it was simple why putting the holes higher didn't work. Only half the water could escape the can, as the holes were halfway up the can. I'm not very happy with his result, but I guess I learned about the mechanics of Force coming into play. Less force is generated if there's less water escaping. That's kind of self-explanatory, and I still don't really know why I chose this modification. At least the project was fun!]]> 2019-09-13 18:50:03 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/383950084 katerynab0049 https://padlet.com/MrsDove/c74tlxxx4if6/wish/384032236 My second engine was more of a success than the first one. The only thing I wanted to change is to add holes, I didn't change the size or anything just the holes. So in the first can I had four holes and in the second one I had eight holes, it kind of helped, but not much. The first model spun 5 times and the second one 7 times. I think what made it spin faster is that there were more holes and the water was coming out faster. ]]> 2019-09-14 00:29:42 UTC https://padlet.com/MrsDove/c74tlxxx4if6/wish/384032236