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Understanding Newton's Second Law: Concepts of Motion, Friction, and Free Body Diagrams

This chapter explores Newton's Second Law of Motion and its applications in understanding friction, mass versus weight, and acceleration. Gain insights into drawing and interpreting Free Body Diagrams (FBD) to analyze forces acting on an object. Practical examples demonstrate concepts such as net force calculations, including friction, and the effects of forces on objects in motion, such as a bullet leaving a rifle barrel. By the end of this chapter, you will grasp the essential principles of motion and the forces that influence it.

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Understanding Newton's Second Law: Concepts of Motion, Friction, and Free Body Diagrams

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  1. Newton’s Second Law Physics 102 Goderya Chapter(s): 4 Learning Outcomes: 1,2,10,11,12

  2. This Chapter will help you understand: • Friction • Difference between mass and weight • Newton’s Second Law of Motion • How to apply Free Body Diagrams (FBD) • Terminal Velocity

  3. Friction

  4. Mass and Acceleration

  5. Newton’s Second Law of Motion

  6. Mass and Weight

  7. Free Body Diagram, Example

  8. Free Body Diagram, Example

  9. Example A force of 10N is applied on a box that has a mass of 3 kg. The box acquires an acceleration of 2 m/s2. What is the net force on the box and how much of that is due to friction.Ans: FN = 6N, f=-4N

  10. Example – Uniform motion • A 5.8 g bullet leaves the muzzle of a rifle with a speed of 334 m/s. What force (assumed constant) is expected on the bullet while it is traveling down the 0.77 m long barrel of the rifle?

  11. Terminal Velocity

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