Newton’s Second Law Pre-Lab

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Presentation transcript:

Newton’s Second Law Pre-Lab Modified Atwood’s Machine What variables affect the acceleration of an object? A B D Acceleration I Net Force Mass of cart (A) System Mass I Mass Hanging mass (B) The track is tilted so that the cart moves with constant velocity when given a small push. Friction? Angle of track? A B

Newton’s Second Law Pre-Lab Purpose: To create graphical and mathematical representations of the relationship between the acceleration, the net force, and the mass of a modified Atwood’s machine. Mass can be measured with the electronic balances around the room. To measure the acceleration you must use Data Studio and the motion detector to find the slope of the velocity vs. time graph. Newton’s Second Law

Newton’s Second Law Pre-Lab Acceleration vs. Force with constant Mass Open the Data Studio file Newton’s Second Law. Add the following masses to the cart. 1 – black bar mass = kg 2 – 5 g masses 0.010 kg 2 – 20 g masses 0.040 kg 1 – 50 g mass 0.050 kg 3 – 100 g masses 0.300 kg 1 – 200 g mass 0.200 kg Total mass in cart

Newton’s Second Law Pre-Lab Acceleration vs. Force with constant Mass How can we change the force but keep the system mass constant? A B To keep the mass constant, all mass must now stay either on the string or in the cart! Move 40. g = 0.040 kg from the cart to the end of the string for the first trial. Don’t forget, the mass hanger adds 5 g = 0.005 kg to the hanging mass.