maximum value for anti tit n, termine the in terms of b, h and Additional Exerci

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maximum value for anti tit n, termine the in terms of b, h and Additional Exercises 11.65 A wooden plank with length L = 8.00 m and mass M-100 kg is centered on a granite cube with side S 2.00 m. A person of mass m-650k m 65.0 kg begins walking from the center of the plank outward, as shown in the figure. How far from the center of the plank does the person get before the plank starts S 2.00 m tion ction tipping? 11.66 A board, with a weight mg= 120.0 N and a length of 5.00 m, is supported by two vertical ropes, as shown in the A figure. Rope A is connected to one end of the board, and rope B is connected at a distance d=1.00 m from the other end ofthe board. A box with a weight Mg 20.0 N is placed on the board with its center of mass at d= 1.00 nm from rope A, what are the tensions in the two ropes? are the 11.67 In a car, which is accelerating at 5.00 m/s2, an air freshener is hanging from the rear-view mirror, with the string maintaining a constant angle with respect to the vertical. What is this angle? ty 11.68 Typical weight sets used for bodybuilding consist of disk-shaped weights with holes in the center that can slide onto 2.20-m-long barbells. A barbell is supported by racks can located a fifth of its length from each end, as shown in the figure. What is the minimum mass m of the barbell if a bodybuilder is to slide a weight with M = 22.0 kg onto the end without the barbell tipping off the rack? Assume that the barbell is a uniform rod. 11.69 A 5.00-m-long board of mass 50.0 kg is used as a seesaw. On the left end of the seesaw sits a 45.0-kg girl, and on the right end sits a 60.0-kg boy. Determine the position of the pivot point for static equilibrium

Explanation / Answer

11.65)

For equilibrium to hold: moments = 0.

mg x = Mg( ½ L - ½ 2.00)

m = 65 kg, M = 100 kg, L = 8 m

x = ½ (100/65) (8 - 2) = 4.62 m

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