The diagram in Figure 4 indicates in an equilibrium force system (no moving), which includes an object A with a mass of 5 kg and the object B with mass of 1 kg. It is assumed that the coefficient of static friction between the block A and the surface of the table is 0.30. Given g = 9.8 and a = 45°. a) Find the friction force exerted on block A... m b) Find the maximum weight w of the block B for which the system will remain in equilibrium. a Figure 4. Equilibrium Force System

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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.