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?