Straw tower By Nianam, Sachreet & Tarnpreet SPICE Situation Problem Investigation/ Ideas Choose/ Create Evaluate We need to build an eight foot (or higher) tower using only 150 drinking straws and tape. This tower has to be able to hold a tennis ball at its tip for 3 seconds or more. So this means that this tower has to be really stable to be able to achieve these requirements. 5+7= (cc) image by anemoneprojectors on Flickr Larger base Triangles Basket at the top Square base Eiffel Tower design Stability Easy to build Strong Little amount of straws 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 0 Problems

- If our tower won't be able to hold the tennis ball because it is not stable enough, resulting in it to collapse.

- Another problem could be if we need more than a 150 straws to complete the tower which would result in it not being able to meet the criteria of eight feet.

Possibilities

- The things that are in our control are that we can change the design and make it look like what we want it to look like.

-We can also decide what height we want our tower to be. (Ours for example is eight feet) We need to build a tower that is 8ft high, with a large square base. Also it has to have triangles along the side to make it more stable and stronger. And we need to build the tower using 150 straws and tape. It can have a basket at the top (for the ball) and sort of an Eiffel tower design

Since we have only 150 straws for eight feet we have decided to divide it into eight equal parts so we know how much to use for each for and we don't overuse

150/8=18.75

So we use 18 straws for each foot and we can use the extra 6 straws to make the basket on top of the tower, where the tennis ball will rest. We have chosen to use a larger base since it is the most important part of the tower. And we have also decided to put triangles on the tower because it is know to be the strongest shape. We also agreed to use a little box at the top where we would put the tennis ball. And the final idea that we are using is the square base because 4 legs are stronger than 3. But we aren’t using the Eiffel Tower design because since we are putting a tennis ball at the top, if we make it thinner at the top, all the weight at the top will fall in the middle. The End Base for each foot Box Front view Total 7 8 6 7 5

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