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Physics > GIZMOS > Atwood Machine GIZMO < COMPLETE> EXCELLENT STUDY MATERIAL (All)

Atwood Machine GIZMO < COMPLETE> EXCELLENT STUDY MATERIAL

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Student Exploration: Atwood Machine Vocabulary: acceleration, Atwood machine, Newton’s second law, pulley, tension, weight Prior Knowledge Question (Do this BEFORE using the Gizmo.) Tarzan is s ... tanding on a tree branch, high above the forest floor, and he wants to get down to the ground. Jane is standing on the ground and wants to get onto Tarzan’s branch. Tarzan holds a vine that reaches to the ground. How could Jane get to the branch at the same time that Tarzan travels to the ground? __________________________________________________ __________________________________________________ __________________________________________________ Gizmo Warm-up Tarzan could tie the vine to the branch and then slide down after Jane climbed up. But there may be an even easier way—what if Tarzan jumped over the branch while holding the vine, pulling Jane up as he came down? A similar scenario is shown in the Atwood Machine Gizmo™. An Atwood machine has two weights connected by a rope that passes over a pulley. As one weight moves down, the other will be pulled up. To begin, check that Mass A is 2.0 kg and Mass B is 3.0 kg. 1. Which mass do you think will move down? ________________________ Which mass do you think will move up? __________________________ 2. Click Play ( ). What happens? ______________________________________________ _________________________________________________________________________ 3. What is the force that pulls mass B downward? ___________________________________Activity A: Up and down Get the Gizmo ready: Click Reset ( ). Check that the Pulley is Frictional and has a Mass of 2.0 kg and a Radius of 0.20 m. Set Mass A to 1.0 kg and Mass B to 2.0 kg. Question: What controls how quickly the two weights on an Atwood machine move? 1. Predict: How do you think the speed at which the heavier mass descends depends on the weight difference of the two masses? ___________________________________________ _________________________________________________________________________ 2. Gather data: Click Play. The time it takes for mass B to hit the bottom is shown at bottom right. Record this time, and then repeat for each combination of masses. [Show More]

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