Figure 10.60(b)for the lower rod:and for the lower rod:for the middle rod:and for the middle rod:for the upper rod:and for the upper rod:10.61. Set Up:Apply to the roller, with counterclockwise torque positive and the axis at the point ofcontact between the roller and the brick. When the roller is on the verge of rolling over the brick, the normal force onit from the ground becomes zero.Solve: (a)The free-body diagram for the roller is given in Figure 10.61a. and are the componets of the forceexerted by the brick. Figure 10.61The moment arm for wis The moment arm for Fis 0.400 m. gives and(b)The free-body diagram for the roller is given in Figure 10.61b. Now the moment arm for Fisgives andReflect:Less force is required when the force is applied at the top of the roller.F510.300 m
This is the end of the preview. Sign up
access the rest of the document.