(20%) Problem 4: Calculate the maximum acceleration of a car that is heading up a 5.50 slope (one that System Static friction Kinetic friction makes an angle of 5.5 with the horizontal, and assuming up the slope is the positive direction) under the following road conditions. Assume that only half the weight of the car is supported by the two drive wheels Rubber on dry concrete 1.0 0.7 and that the coefficient of static friction is involved-that is, the tires are not allowed to slip during the acceleration. Rubber on wet concrete 0.7 0.5 Steel on steel(dry) 0.6 0.3 Randomized Variables Steel on steel (oiled) 0.05 0.03 0 =5.50 Shoes on wood 0.9 0.7 Shoes on ice 0.1 0.05 Steel on ice 0.4 0.02 Otheexpertta.com 33% Part (a) Calculate the maximum acceleration of the car on dry concrete in m/s-. A 33% Part (b) Calculate the maximum acceleration of the car on wet concrete in m/s-. A 33% Part (c) Calculate the maximum acceleration of the car on ice in m's , assuming that u, = 0.100 , the same as for shoes on ice. Grade Summary amax Deductions 0% Potential 100%(20%) Problem 5: A 58 kg and a 98 kg skydiver jump from an airplane at an altitude of 6000 m, both falling in the diving headfirst position. Assume their surface area is 0.145 m- and the drag coefficient is 0.70. Randomized Variables my = 58 kg my = 98 kg A = 0.145 m- A 50% Part (a) How long will it take for the first skydiver to reach the ground in seconds (assuming the time to reach terminal velocity is small and the density of the air is a constant 1.21 kg/m-)? A 50% Part (b) How long will it take for the second skydiver to reach the ground in seconds (assuming the time to reach terminal velocity is small)? 1 = Grade Summary Deductions 0% Potential 100%