1) A car of mass m=1000 kg is sliding down a hill. The coefficients of friction between the car's tires and the ground are us=0.89 and uk=0.61. For what inclination angle will the car slide down the hill with a constant velocity?
2) A skier finds that she must give hersel a push to get started down ski slopes with angles less than 8 degrees. What is the coefficient of static friction between the skis and the snow?