Q.1) Draw a Free Body Diagram for each object indicated below. Include values for known forces and moments and variables for any unknown quantity. Use dashed lines to include any dimensions or angles when appropriate. Any two-force member should be modeled using a single force in the appropriate direction. (a) Draw member ABD assuming all members have negligible mass. B, C, and D are all pin connections. 1 in." A 50 lb 2 in. O 3 in. (b) Draw member ABC. Assume the mass of ABC is negligible, the mass and size of pulleys C and D are negligible and the pulleys are frictionless. A represents a pin connection. 0.5 m 0.4m 0.4 m -0.4m 60 kg

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Free Body Diagram

The system of forces acting on a body tends to either rotate it or make the body undergo motion. In general, when an external agent exerts a force on a body, the body undergoes translational motion and rotational motion. The body has six degrees of freedom under the influence of that force. Here, three degrees of freedom are from the translational motion while the other three are from the rotation motion. However, sometimes the bodies are not allowed to undergo any motion and are fixed, under such conditions the body is said to be constrained.