Category: Science 10
Constant Velocity and Acceleration
1. This first video relates to the constant velocity concept. Constant velocity is when an object moves at the same distance at every second. This means the speed and direction of velocity stay constant. I chose this animation of the planets because through their years there orbit stays the same moving around the sun at a consistant speed and regular direction.
Constant velocity is a vector meaning that along with magnitude (speed) is a direction that fully describes the quantity. the magnitude refers to how fast the object is moving (meters per second, kilometers per hour, and mph miles per hour). For direction, you use geographical directions (North, South, East, or West) and a positive sign or a negative sign (to represent up or to the right and down or to the left, respectively). The earth is moving 30 kilometers per second, or 67,000 miles per hour North.
2. The second video I have of a roller coaster relates to acceleration. Acceleration is when velocity changes and since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction—or change both. A roller coaster relates to this because they slow down when going up a hill the cart goes slow but once it makes it over the hump it speeds up and does loops increasing and decreasing the speed.
If your changing your speed and not your direction then you are not accelerating. The force of gravity that pulls a roller coaster down hill causes the roller coaster to go faster and faster, it is accelerating. The force of gravity causes a roller coaster to go slower and slower when it climbs a hill, the roller coaster is decelerating or going slower.
The Maelifell Volcano, Iceland
This is the Maelifell Volcano, located on the edge of Myrdalsjökull glacier in Iceland. This relates to our PowerPoint about volcanoes and the different types like, Composite Volcanoes, Sheild Volcanoes, and Rift Eruptions. It is a Composite Volcano that is mainly made of pillow lava and has an elevation of 1771 feet. This volcano is extinct and hasn’t erupted since the end of the last ice age nearly 10,000 years ago. It is a major tourist site due to its incredible beauty. It is a perfect cone that is covered in a special green moss that changes from dark grey to bright green.
Citations:
http://easybib.com/key/48175b
Float Your Boat- Project
Observation and Conclusion:
1.) State the problem of this experiment:
How can you make a tinfoil boat with only a few materials and have it hold the most amount of pennies.
2.) State your hypothesis for this experiment:
If you make a tinfoil boat that is triangular and uses straws and coffee stirrers then it will balance the most pennies because it has lots of support and a compactable shape.
3.) How many pennies did your boat hold:
Our boat held 33 pennies.
4.) What was your thinking/reasoning behind the design of your boat?
We thought that if we made a smaller boat that was more supported and firm. We put straws and stirs on the bottom so it would float better and have more support for the weight.
5.) What would you keep/change on your boat design if you were to do this again?
i would have made it bigger so more pennies could fit in. I would also not have put tape on the bottom because the water made it fall off.
