Why the different values for different surfaces

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Q. Bruce stands on a bank beside a pond, grasps the end of a 10.00-m long rope attached to a nearby tree and swings out to drop into the water. If the rope starts at an angle of 36° with the vertical, what is Bruce's speed at the bottom of swing?

Q. A person can survive a feet-first impact at a speed of about 12m/s (27 m/h) on concrete; 15.00 m/s (34 m/h) on soil; and 34 m/s (76 m/h) on water. Why the different values for different surfaces?

Reference no: EM1372708

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Why the different values for different surfaces : Bruce stands on a bank beside a pond, grasps the end of a 10.00-m long rope attached to a nearby tree and swings out to drop into the water. If the rope starts at an angle of 36° with the vertical, what is Bruce's speed at the bottom of swing.

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