Chapter 8, Problem 16P

The pickup truck pulls the wooden crate, as shown in Figure 2. The truck has a mass of 1.25 Mg and a center of mass at G. The coefficient of static friction between the truck's wheel and the ground is µ = 0.5, and between the wooden crate and the ground is µs' = 0.4. Determine the greatest weight of the wooden crate the pickup truck can pull if:   a) the truck has rear-wheel drive while the front wheels are free to roll, and   b) the truck has four-wheel drive.

The truck has a mass of 1.25 Mg and a center of mass at G. Determine the greatest load it can pull if: (a) the truck has rear-wheel drive while the front wheels are free to roll. (b) the truck has four-wheel drive. The coefficient of static friction between the wheels and the ground is µs=0.5, and between the crate and the ground, it is us=0.4. Note: Rear-wheel drive means the rear wheels must slip and four-wheel drive all four wheels must slip. So in this problem, the wheels must be on the verge of slipping, max. friction force. 800 mm 600 mm F1.5 m--–1 m 10°

The crane truck has a weight of 10750 lb and a center of gravity at point . The parking brake only locks the rear wheels of the truck, so the front wheels are free to rotate. Determine the maximum force F applied at the angle 0 = 36° that can be exerted on the crane without it slipping or tipping for each of the following cases: Case 1: The static friction coefficient between the rear tires and the ground is μ = 0.060. Case 2: The static friction coefficient between the rear tires and the ground is μ. = 0.35. h CGD . п d k a жь D с LL BY NC SA 2013 Michael Swanbom ၅၁ Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 5 ft b 9 ft с 5.5 ft d 3.5 ft h 11 ft For Case 1, the constraint is Select an answer Fmax lbs. For Case 2, the constraint is Select an answer F max lbs. and and