CH_5 Physics - Solving Problems with Newtons Laws:...

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Unformatted text preview: Solving Problems with Newtons Laws: Free-Body Diagrams Applications Involving Tension, Friction, Inclines Kinematics of Circular Motion Dynamics of Circular Motion Problem Solving A General Approach Units of Chapter 5 Summary of Chapter 4 Newtons first law: If the net force on an object is zero, it will remain either at rest or moving in a straight line at constant speed Newtons second law: Newtons third law: Free-body diagrams are essential for problem- solving Weight is the gravitational force on an object Normal force on an object 5.1 Solving Problems with Newtons Laws Free-Body Diagrams 1. Draw a sketch . 2. For one object, draw a free-body diagram , showing all the forces acting on the object. Make the magnitudes and directions as accurate as you can. Label each force. If there are multiple objects, draw a separate diagram for each one. 3. Resolve vectors into components. 4. Apply Newtons second law to each component. 5. Solve. 5.1 Solving Problems with Newtons Laws Free-Body Diagrams When a cord or rope pulls on an object, it is said to be under tension , and the force it exerts is called a tension force . 5.2 Applications Involving Friction, Inclines On a microscopic scale, most surfaces are rough. The exact details are not yet known, but the force can be modeled in a simple...
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CH_5 Physics - Solving Problems with Newtons Laws:...

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