A 60kg pole vaulter running at 13ms vaults over the bar., Ask an Expert

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Q. The edges of a cube consist of equal resistors of resistance R, which are joined at the corners. Let the battery be connected to two opposite corners of a face of the cube. What is the effective resistance?

Q. A 60kg pole vaulter running at 13m/s vaults over the bar. Her speed when she is above the bar is 0.7m/s. Neglect air resistance, as well as any energy absorbed by pole, and determine her altitude as she crosses the bar?

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