(20%} Problem 1: An ice skater is traveling in a straight= horizontal line on the ice with a velocity of 1: = 3'. 5 m. s in the positive xdirection. The coefficient of kinetic 'iction between the skates and the ice is [Mk = 3.18. Randomized Variables V: 7.5 ms yk=4118 a, 25% Part [a] Write an expression for the normal force: 5'3", that the ice pushes against both skates together. Assume the skatefs mass is m. _ Grade Summary F-\"_ l Deductions Potential 100% Submissions Attempts remaining: I P91 attempt) detailed View (20%) Problem 1: An ice skater is traveling in a straight, horizontal line on the ice with a velocity of v = 7.5 m's in the positive x-direction. The coefficient of kinetic friction between the skates and the ice is /x = 0.18. Randomized Variables v = 7.5 m's Mx = 0.18 A 25% Part (a) Write an expression for the normal force, Fy: that the ice pushes against both skates together. Assume the skater's mass is m. A 25% Part (b) Using the expression for normal force, write an expression for the skater's acceleration in the x-direction, a. Grade Summary Deductions 0% Potential 100%[20%) Problem 1: An ice skater is traveling in a straight: horizontal line on the ice with a velocity of 1; = 7.5 rn. s in the positive xclirection. The coefcie kinetic friction between the skates and the ice is it; = 13.13. Randomized Variables 1;: 7.5ms #kmJS art {11) Write an expression for the normal force: Fir: that the ice pushes against both skates together. Assume the skater's mass is m. P Part (b) Using the expression for normal force. write an expression for the skater's acceleration in the xdiIection, a. Part [an How long= 1;: in seconds, will it take for the skater's velocity to drop by half'? Grade Su I Deduction [20%] Problem 1: An ice skater is traveling in a straight: horizontal line on the ice with a velocity oft; = 7. 5 In. 5 in the positive xdirection. The coefc. kinetic iction between the skates and the ice is [ME = 9.18. Randomized 1Variables 1; = 7. 5 m 5 M = 3.13 -j a, 25% Part (:1) Write an expression for the normal force: Fir: that the ice pushes against both skates together. Assume the skaters mass is m. -j a. 15 :7: Part {b} Using the expression for normal force. write an expression for the skaters acceleration in the x-direction, a. -j a 25% Part (c) How long, I}: in seconds: will it take for the skater's velocity to drop by half? i, 25% Part [d) How far: a}: in meters. will the skater travel during the time th'.' Grade E a}: = l Deductic Potentia