IB Physics IA.pdf - IB Physics HL Internal Assessment An...

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IB Physics HL Internal Assessment An Investigation of the Acceleration of Objects on an Inclined Plane Exam Session: May 2017 School Name: John A. Rowland High School Teacher: Dave Canfield Date: 17 February 2017 Course: IB Physics HL Candidate Number: 001092-0024
2Research Question: As a child, I enjoyed the thrilling experience of riding down a steep drop on roller coasters at Disneyland. Looking back, I realized that the typical roller coaster works mainly via gravity and that the acceleration of the acceleration primarily provides the “thrill” of the ride. This childhood experience sparked my interest in the topic of kinematics. Thus, the aim of this investigation is to determine to what extent the acceleration of an object, in which there is no external force, traveling on an inclined plane remains constant. Hypothesis/Theory: According to Newton’s Second Law, the net force equals mass times acceleration, or Fnet=ma. For an object traveling along an inclined plane with angle θ, the net force equals to mgsinθ. In this case, a component of gravity accelerates the object down the plane. By solving the two equations, we know that a=gsinθ. Since there is no external force in the system, it is expected that acceleration will remain constant and its value will be close to gsinθ. Variables: The independent variables of this experiment will be the the angle of elevation of the ramp and mass of the cart. Another independent variable is the initial velocity of the cart, which will be altered as the force used to propel the cart up the ramp is different each time. The dependent variable of the experiment will be the acceleration of the cart. The control variable includes the acceleration due to gravity, which will remain constant as the experiment is performed at the same location each time. The frictional force, notably the coefficient of friction, will be controlled as the cart will travel on the same
3ramp throughout. Moreover, the mass of the cart will be controlled as it will be changed from 0.250 kg to 1.250 kg, 0.250 kg at a time.

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