Chapter 3 20. A crane operator must consider the angle of the boom Section 3.3 because of its capacity to tip the crane to the side. This force is called torque and is calculated using the formula T FL. 25 T= torque (measured in foot-pounds), F = force 1 (measured in pounds), and L = lever arm distance (measured in feet). OO lb Use trigonometry to calculate the lever arm distance and the resulting torque on a crane lifting 600 pounds at a 10 degree angle with a 32 foot boom, round L to the 32 hundredth and T to the nearest whole number. Note: the dimension is on the top of the boom and the bottom would be the same length. L

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