# Lab 112 - Steven Valentin Group Noelle Fifi Marlyn Phys...

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Steven Valentin Group: Noelle, Fifi, Marlyn Phys 111A-010 Yan Liu February 13, 2016 Title: Lab 112: Newton’s Second Law Introduction: The objectives of this experiment are to verify Newton’s second law in a one- dimensional motion system, where a glider of known mass on a frictionless air track is accelerated by a falling object connected to the glider with a string; to learn how to construct free body diagrams used to show all forces with the magnitude and direction acting on an object in a one-dimensional system; and to understand how to derive the equation for theoretical acceleration from the free body diagrams and to compare the theoretical value for acceleration to the experimentally obtained value. Theory : Newton’s First Law of motion states that if no net force is acting on an object at rest, it stays at rest, and if no net force is acting on an object moving at a constant velocity, it continues moving at constant velocity in the same direction. However, when a net force does act on an object, it causes acceleration, a change in velocity during the time period that the net force is exerted. This is Newton’s Second Law of Motion, which states, “When a net force is exerted on an object, the acceleration of the object is directly proportional to the force, and is inversely proportional to the object’s mass. The direction of the acceleration is in the direction of the net force acting on the object.” This equation can be written as: a = Σ F /m or Σ F = m a Because all forces acting on an object can be decomposed into their relative components in the x,
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