Learn on PengiAmplify Science (California) Grade 8Chapter 4: Science Seminar (Case Study: Movie Stunts)

Lesson 4: End-of-Unit Assessment

Key Idea.

Section 1

Engineering and Justifying a Solution

Key Idea

The final challenge transforms the investigation into an engineering task: proposing a fix to prevent the stunt failure. The goal is to manipulate variables—specifically mass and friction—to alter the outcome. Effective proposals might include applying a high-friction material (like rubber mats) to the surface.

Crucially, this proposal must be backed by a scientific prediction based on the Force-Velocity Model. The reasoning follows a clear causal chain: increasing surface roughness increases the force of friction exerted opposite to the car's motion.

Lesson overview

Expand to review the lesson summary and core properties.

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Section 1

Engineering and Justifying a Solution

Key Idea

The final challenge transforms the investigation into an engineering task: proposing a fix to prevent the stunt failure. The goal is to manipulate variables—specifically mass and friction—to alter the outcome. Effective proposals might include applying a high-friction material (like rubber mats) to the surface.

Crucially, this proposal must be backed by a scientific prediction based on the Force-Velocity Model. The reasoning follows a clear causal chain: increasing surface roughness increases the force of friction exerted opposite to the car's motion.