raune Achun rldnn PHYS 2201 Due Monday, 16 October 2017, in class Weekly Problem

Question

raune Achun rldnn PHYS 2201 Due Monday, 16 October 2017, in class Weekly Problem 10 10.1 Hey, slow down there! [FRAMEWORK] A snow boarder who has recently waxed her board slides straight down a steep, icy slope with a grade of 40%. She starts from rest at the top of the run, which is 25 m long. 25 n (A) What assumptions can you make to simplify this situation to make it easier to analyze? (B) How fast is she going when she reaches the bottom? Give answer in m/s and mi/h. (C) How long does it take to her to reach the bottom?( 1e 216 22,112 2.3 ad

Explanation / Answer

B)slope of ice=tan-1(0.4) = 21.8o

Acceleration of snow boarder down the slope=9.8*sin21.8=3.64 m/s2

Initial velocity=0

Distance travelled = 25m

v2=u2+2as

v2=0+(2*3.64*25)=182

v=13.49 m/s

C) Time taken to reach bottom = 13.49/3.64=3.7 seconds

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