The figure ( Figure 1 ) shows a small plant near a thin lens. The ray shown is o

Question

The figure (Figure 1) shows a small plant near a thin lens. The ray shown is one of the principal rays for the lens. Each square is 4.50cmalong the horizontal direction, but the vertical direction is not to the same scale. Use information from the diagram to answer the following questions.

A) What is the focal length of the lens?

B) Calculate where the image should be.

Two shafts AC and BC, both of length L and made of material with shear modulus G, are connected at gear C. Shaft BC has radius r, shaft AC has radius 2r, and gear C has radius 4r. The ends of the shafts at A and B are attached to rigid supports in a way that prevents rotation at those points. (Note that the end supports at A and B are not shown.) A torque TD, positive in the direction shown, is applied to gear D, which has radius 2r. Determine the reaction torques at A and B in order to prevent rotation at those points. Determine the rotation of gear C. Determine the rotation of gear D.

Explanation / Answer

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