Friction on Inclines

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Objective

I can predict whether an object will slide down an inclined plane based on the forces acting on it.

Part 1 of 3

Warm-up video

Flipping Physics · 6:41

We don't generate video — this one is by Flipping Physics on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.

Part 2 of 3

Practice

7 questions

1

Explain in your own words why the force of static friction increases as the angle of an incline increases, up to a certain point.

2

A block is placed on an incline. Describe the conditions under which the block will remain stationary, and the conditions under which it will begin to slide.

Part 3 of 3

Exit ticket

Quick comprehension check

A block is at rest on an inclined plane. If the angle of the incline is slightly increased, but the block remains at rest, what must be true about the force of static friction? A box is on an inclined plane and is just about to slide. If the mass of the box is doubled, will the box slide immediately, remain at the point of almost sliding, or remain stable? Explain your reasoning.

Sample answer included in the free materials

Get the materials

Teacher guide, student handout, and slides — free, in Google Docs format

  • Teacher Guide

    Complete lesson plan with answer keys and alternate activities

  • Student Handout

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