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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Express an understanding of the design of the two experiments.
Analyze Experiment 2 data (perfectly elastic collisions) to determine general patterns.
An investigation of hit-and-stick and perfectly elastic collisions.
Analyze both Experiment 1 and Experiment 2 to determine patterns associated with the two types of collisions.
Wizard Difficulty Level
Analyze Experiment 1 data (hit-and-stick collisions) to determine general patterns.
Apprentice Difficulty Level
Immortal Sage Difficulty Level
Master Difficulty Level
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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.
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A group of physics students are investigating the effect of the mass of two colliding carts upon their post-collision velocities. Being vectors, the velocities can be positive (for moving rightward) or negative (for moving leftward).
In Experiment 1, Cart B is at rest on the track. They push Cart A towards it. The carts are equipped with Velcro strips so they stick together when they collide. The two carts collide and move with the same speed after the collision. A motion detector is used to determine the before- and after-collision velocity of Cart A. For subsequent trials, the mass of the carts are varied by adding bricks to them. Their data is shown in Table 1.
In Experiment 2, the carts have embedded magnets that repel each other before contact is made. Cart B is at rest on the track and Cart A is in motion. After the collision, the carts move at separate velocities. Several trials are conducted using different mass combinations. Their data is shown in Table 2.
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Template Version 1.2 Added Question Scene 4 for Table Completion