1. The 1600-kg car is just beginning to negotiate the 16° ramp. If the car has rear-wheel drive, determine the minimum coefficient of static friction required at B.
2. Repeat Prob. 1, but now the car has front-wheel drive.
3. Repeat Prob. 1, but now the car has all-wheel drive. Assume that slipping occurs at A and B simultaneously.
4. The rectangular steel yoke is used to prevent slip- page between the two boards under tensile loads P. If the coefficients of static friction between the yoke and the board surfaces and between the boards are all 0.30, determine the maximum value of h for which there is no slipping. For P = 800 N, determine the corresponding normal force N between the two boards if motion impends at all surfaces.