(11%) Problem 3: A contestant in a winter sporting event pushes a 42 kg block of ice in the positive direction across a frozen lake as shown in the figure. Assume the coefficients of static and kinetic friction are My=0.1 and uk=0.03. 25 F Randomized Variables m = 42 kg Otheexpertta.com *50% Part (a) Calculate the minimum force F he must exert to get the block sliding across the ice in newtons. Fmin = 421 Grade Summary Deductions 0% Potential 100% sin( cos tan( ( ) 7 8 9 HOME cotan() asin() acos() E 1 4 5 6 Submissions Attempts remaining: 995 atan() acotan() sinh() * 1 2 3 (0% per attempt) cosh() tanh() cotanh() + 0 END detailed view Degrees . Radians VO BACKSPA DEL CLEAR 0% 0% WN Submit Hint Feedback I give up! 0% Hints: 4 for a 0% deduction. Hints remaining: 0 Feedback: 3 for a 0% deduction -Draw a free body diagram. Check your free body diagram. Force of pushing is not What kind of frictional force is acting in this problem? horizontal. -Notice that he is pushing downward on the block as well; how does this change the normal force? -To find the minimum condition notice that the static friction has a maximum value: " FN- 4 50% Part (b) What is its acceleration in m/s once it starts to move, if that minimum force is maintained