Finding Acceleration
3
Newton's Laws - Lesson 3 Newton's Second Law of Motion Finding Acceleration As learned earlier in Lesson 3 (as well as in Lesson 2), the net force is the vector sum of all the individual forces. In Lesson 2, we learned how to determine the net force if the magnitudes of all the individual forces are known. In this lesson, we will learn how to determine the acceleration of an object if the magnitudes of all the individual forces are known. The three major equations that will be useful are the equation for net force ( Fnet = m•a), the equation for gravitational force (F grav = m•g), and the equation for frictional force (F frict = μ•F norm ). The process of determining the acceleration of an object demands that the mass and the net force are known. If mass (m) and net force (F net ) are known, then the acceleration is determined by use of the equation. Thus, the task involves using the above equations, the given information, and your understanding of Newton's laws to determine the acceleration. To gain a feel for how this method is applied, try the following practice problems. Once you have solved the problems, click the button to check your answers. Practice #1 An applied force of 50 N is used to accelerate an object to the right across a frictional surface. The object encounters 10 N of friction. Use the diagram to determine the normal force, the net force, the mass, and the acceleration of the object. (Neglect air resistance.)
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Transcript of Finding Acceleration
8/6/2019 Finding Acceleration
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