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Energy and Momentum Systems · Weeks 10-18

Conservation of Energy: Non-Conservative Forces

Students will analyze situations where non-conservative forces (like friction) are present and how they affect energy conservation.

Key Questions

  1. Explain how non-conservative forces alter the total mechanical energy of a system.
  2. Analyze the role of friction in converting mechanical energy into thermal energy.
  3. Predict the final velocity of an object sliding down a ramp with friction, using energy principles.

Common Core State Standards

HS-PS3-3
Grade: 12th Grade
Subject: Physics
Unit: Energy and Momentum Systems
Period: Weeks 10-18

About This Topic

This topic examines the multifaceted roles of the President, from Commander-in-Chief to Chief Legislator. Students trace the expansion of executive power from the limited vision of the Founders to the modern 'Imperial Presidency.' They analyze formal powers found in Article II and informal powers like executive orders, executive agreements, and the 'bully pulpit' used to shape public opinion.

For 12th graders, understanding the Presidency is about understanding the tension between leadership and accountability. It connects to current debates over executive overreach and the use of social media in governance. This topic comes alive when students can physically model the patterns of presidential decision-making through crisis simulations and role-play.

Active Learning Ideas

Watch Out for These Misconceptions

Common MisconceptionThe President can make laws.

What to Teach Instead

Only Congress makes laws. The President can issue executive orders, but these are limited to how the executive branch operates or implements existing law. Peer-led 'fact-checking' of recent orders helps students see these legal boundaries.

Common MisconceptionThe President's power is greatest in domestic policy.

What to Teach Instead

The President actually has far more 'unilateral' power in foreign policy and as Commander-in-Chief. A comparison of Article II powers vs. historical actions helps students see the 'two presidencies' (foreign vs. domestic) thesis.

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Frequently Asked Questions

What is 'Executive Privilege'?
It is the President's claimed right to keep certain communications confidential, especially regarding national security. However, as seen in US v. Nixon, this privilege is not absolute and cannot be used to hide evidence in a criminal investigation.
How does the 'Veto' work as a legislative tool?
Beyond just killing a bill, the 'threat' of a veto allows the President to influence the drafting of legislation. Congress will often change a bill to satisfy the President's concerns rather than risk a veto they cannot override.
What are the best hands-on strategies for teaching the Presidency?
Role-playing the 'Cabinet Meeting' is highly effective. By assigning students to different departments (State, Defense, Treasury), they realize that the President must manage competing interests within their own branch. This surfaces the complexity of the 'Chief Executive' role beyond just being a single decision-maker.
What are the requirements to be President?
According to Article II, a candidate must be a natural-born citizen, at least 35 years old, and a resident of the US for at least 14 years. These 'low' barriers reflect the Founders' desire for a citizen-leader rather than an aristocrat.

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