# torque produced computation

Jun 17th, 2015
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1. Figure 8.4 is a top view of a packing crate being pushed by two forces of equal magnitude acting in opposite direction as shown. Find the net torque exerted on the crate if its width is 1.0m. Assume an axis of rotation through the center of the crate. Solution. Because each force produces clockwise rotation, the torques are both negative.

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1. Figure 8.4 is a top view of a packing crate being pushed by two forces of equal magnitude acting in opposite direction as shown. Find the net torque exerted on the crate if its width is 1.0m. Assume an axis of rotation through the center of the crate.Solution. Because each force produces clockwise rotation, the torques are both negative. The torque produced by is and the torque produced by isThus, the net torque is exerted on the crate .2. Find the torque produced by the force applied at an angle of to the door of figure 8.5aReasoning in figure 8.5. The force has been replaced by its horizontal and vertical components:Solution. In this case, the force produces zero torque about the axis of rotation because the line along which the force acts passes through the axis of rotation and hence the lever arm is zero. The force has a lever arm of and thus produces a torque of Where the plus sign indicates the door rotates in the counterclockwise direction.3. Three particles are located in a coordinate system as shown in the Figure 8.9. find the center of gravity.Reasoning and Solution. The y coordinate of the center of gravity is zero because all the particles are also on the x axis. To find the x coordinate of the center of gravity, we use Equation 8.3: For the numerator, we find The denominator is; therefore,4. In this example we show how to find the location of a person

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