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Team, look! they have otters! Just like the US! For our "Wildlife" slide, I would like to incorporate otters into my part of the presentation.

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Team, this looks useful for our scale models!

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What's going on?

Real bobsleds, like those used in the Olympics, can weight 280 to 460 pounds by themselves, and have teams of two or four people who drive them down the track. The world's steepest bobsled track is 4757 feet long and has a 500 foot elevation change from start to finish; this can generate speeds up to 95 miles per hour! Plus, bobsled tracks are not straight like the one we used in this activity, so the athletes have to learn to steer their speedy bobsled around turns and curves on ice!

At the top of the track, the bobsleds have high potential energy and no kinetic energy (because they aren't moving). As the athletes push the slide down the track and jump in, they start the conversion of the potential energy into kinetic energy. When all the athletes jump into bobsled, they now rely on their driver, principles of physics like gravity, friction, and drag, and a well-engineered sled to help them get down the track fastest!

Drag is also known as air resistance and is a type of friction. Remember how we discovered friction by rubbing our hands together? Then, we learned that any two materials rubbing against each other experience friction; air is one of those materials. When you walk around, you rub against air and experience some air resistance, although you probably don't feel it all the time. In a bobsled going really fast, the drag becomes very noticeable and can slow a bobsled down significantly. The larger the surface area of an object hitting the air and the faster the object is moving through the air, the more drag the object will experience. To reduce drag, teams design and test different sled shapes and practice ducking down inside the sled because the more sleek and smooth the sled appears to the air, the less drag it will experience.

Athletes and their bobsled engineers also work to reduce other kinds of friction. The athletes have to practice pushing the sled and jumping in while keeping the sled straight because any side to side movement will increase friction and slow down their bobsled. The driver has to be very precise and use his team members to help shift weight in the sled to make smooth turns. If the sled touches a wall of the track there will be friction.

Gravity is a constant force, so all of the bobsled teams will experience the same acceleration due to gravity, but they can all experience different forces of drag and friction. At some point, gravity will equal the drag and friction forces, but in the opposite direction, this is known as terminal velocity. The bobsled cannot go any faster. To have the fastest run, bobsled teams don't want to reach terminal velocity, they want to keep accelerating as long as possible, so they want to reduce drag and friction and be at the maximum weight allowed in the competition. There's a lot of science and engineering know-how needed to win an Olympic medal in bobsled!

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Olympic Engineering: Bobsled Challenge - Explora

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What's going on? Real bobsleds, like those used in the Olympics, can weight 280 to 460 pounds by themselves, and have teams of two or four people who drive them down the track. The world's steepest bobsled track is 4757 feet long and has a 500 foot elevation change from start to finish; this can generate speeds up to 95 miles per hour!

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I think there might be 2 flags we need to research

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The Flags of Scotland - Saltire and Lion Rampant

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When St. Andrew was being crucified by the Romans in A.D. 60, he met his end on a 'saltire', or X-shaped cross (St. Andrew's cross) which became his symbol. Two separate legends help to explain the association between St. Andrew and Scotland.

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Team, did you know the national animal of Scotland is the Unicorn?!?!?