Use the following information and illustration for questions 24-26. The path of a sledder is shown below; upon descending the hill, the sledder ultimately glides up a
ramp to a final resting position (at D). Frictional forces can be assumed to be negligible. (Given: m =
30 kg; Height at A = 6 m, Speed at A = 14 m/s.) Fill in your answers on your scantron and only for the
questions asked on 7-9 (you do not need to fill in the entire chart).

h = 4 m at B
24. Kinetic Energy at Point B. Round to the nearest whole number.
25. Potential energy at Point B. Round to the nearest whole number.
26. Velocity at point B. Round to the tenth place (1 decimal place)

People with normal vision cannot focus their eyes underwater if they aren't wearing a face mask or goggles and there is water in contact with their eyes. in a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. with the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 2.05cm in front of the eye.)