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Question 1 : When a person ice skates, the surface of the ice actually melts beneath the blades, so that he or she skates on
Question :
When a person ice skates, the surface of the ice actually melts beneath the blades, so that he or she skates on a thin sheet of water between the blade and the ice.
a Find an expression for total friction force on the bottom of the blade as a function of skater velocity blade length water thickness between the blade
and the ice water viscosity and blade width
b Suppose an ice skater of total mass is skating along at a constant speed of when she suddenly stands stiff with her skates pointed directly forward,
allowing herself to coast to a stop. Neglecting friction due to air resistance, how far will she travel before she comes to a stop? Remember she is coasting on
two skate blades. Give your answer for the total distance travelled, as a function of and
c Find for the case where and Do you think our assumption of negligible air resistance is a
good one?
d Write a pythonMATLAB code for computing the distance as a function of and keeping all other parameters constant. Take six values between
and for six different people of and Plot a three dimensional plot with on the first axis, as the second axis and
as the third axis.
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