ItsAllUphill

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Objective: To identify whether positive, negative, or zero work is being done, to identify the force that is doing the work, and to describe the energy transformation associated with such work.

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It's All Uphill

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Analyze the reults of an experiment to identify claims that are supported by evidence.

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Revise an energy model for this experiment to make predictions regarding a similar phenomenon that has some minor differences.

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Use an energy model to explain the results of the It’s All Uphill experimental data.

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Use a model of energy to provide reasoning for why the results of the experiment were observed.

Analyzing the Results

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Explaining the Results

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Each Science Reasoning task is based on a passage or story that presents data and information or describes an experiment or phenomenon. Students must combine an understanding of science content and science reasoning skills (science practices) to answer questions about the passage or story. Tap anywhere to view the passage.

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Activity 1: Analysis of Results A student lab group is investigating the effect of the angle of an incline upon the amount of force required and the amount of work done in pulling a cart up an incline at a constant speed. They use a force probe to measure the force (F) for various incline angles (θ) and they use a meter stick to measure the displacement (d) of the cart. The work (W) is calculated from the F and d values. In Experiment 1 (Trials 1-5), the lab group uses a 2.1-kg cart and pulls it to a height of 1.05 m during each trial. In Experiment 2 (Trials 6-10), the lab group uses a 3.8-kg cart and pulls it to a height of 1.05 m during each trial. In Experiment 3 (Trials 11-15), the lab group uses a 2.7-kg cart and pulls it to a height of 0.85 m during each trial. Their data are shown in the tables.

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Analyzing the Results,To the Chair Top,To the Summit,Explaining the Results

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