Forces, Work & Energy Integration - Study Guide

REF STUDY GUIDE: Big Ideas Use to answer form questions

1.Work as Energy Transfer: Work equals force times distance (W = F x d), measured in joules — when you lift a book off the floor, you do work on it by applying an upward force over the distance it rises, transferring energy into the book.

2.Work and Energy Changes: Doing work on an object changes its energy — pulling a roller coaster car to the top of a hill converts the work you do into gravitational potential energy (PE), which then becomes kinetic energy (KE) on the way down.

3.Power and Machines: Power is how fast work gets done (P = W/t), measured in watts — a powerful motor and a weak motor can do the same work, but the powerful one finishes faster, which is why elevators need high-power motors.

4.Simple Machines and Mechanical Advantage: Simple machines like ramps, levers, and pulleys reduce the force needed by increasing the distance over which you push or pull — they do not create extra energy, they just redistribute the effort.

DRAW KEY TERMS Google each → Images tab → sketch what you see

Joule

Unit of work and energy (1 J = 1 N·m = 1 kg·m²/s²)

Watt

Unit of power (1 W = 1 J/s)

work

Force applied over distance; transfers energy (W = F × d)

power

Rate of doing work; how fast energy is transferred (P = W/t)

WRITE FOCUS QUESTION Your initial thinking

An elevator in a tall building lifts dozens of people many floors — yet the electric motor that drives it is surprisingly small. Engineers use pulleys and counterweights so a modest motor can move loads far heavier than itself.

How can a tiny motor lift a heavy elevator?

I think...TODO: author answer text

WRITE AFTER HOOK FORM Reflect before continuing

I learned that... TODO: author answer text

Station 1 — Work = Force × Distance

I observed that... TODO: author answer text

This shows that... TODO: author answer text

The key concept is... TODO: author answer text

Station 2 — Mechanical Systems - Power & Efficiency

The data shows... TODO: author answer text

This connects to... TODO: author answer text

The main idea is... TODO: author answer text

This connects to what we learned because...

I can apply this by... TODO: author answer text

DRAW CONCEPT MODEL Show your understanding visually

Draw a model that shows the main concept. Include labels and arrows to explain relationships.

TODO: author answer text

Labels included

Relationships shown

Key terms used

CHECK TEST YOUR THINKING Rate each: FALSE ← 1-2-3-4-5 → TRUE

1. Simple machines like levers and pulleys create extra energy to make work easier.

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2. If you push hard on an object but it does not move, you have still done work on it.

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3. A ramp reduces the total amount of work needed to lift an object to a certain height.

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4. The amount of effort you feel is the same as the scientific definition of work.

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5. A machine with a higher mechanical advantage always does more work than one with a lower mechanical advantage.

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Pick any TWO statements — especially any you rated 2, 3, or 4. Justify your rating with evidence:

Statement #___ — I rated it ___ because:

THINK SCIENTIST CIRCLE DEBRIEF Reflect after your Scientist Circle discussion

AHA! Moment

The one I changed my thinking most about is... TODO: author answer text

Remaining Question

I still wonder... TODO: author answer text

WRITE FOCUS QUESTION REVISIT Final written response

How can a tiny motor lift a heavy elevator?

TODO: author answer text