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On a bobsled run, there is a particularly steep 90° wall. Friction is essential to keep...

On a bobsled run, there is a particularly steep 90° wall. Friction is essential to keep from sliding down this wall.

Draw a force diagram to convince yourself that this is true, and explain why.

For a bobsled traveling at 26.8 m/s, what is the necessary coefficient of friction to keep it from sliding down the wall?

For a wall at 45°, what is the speed at which a 80 kg bobsled plus rider can negotiate a 10 m radius turn?

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