KS3 Year 7 / Physics / Curriculum
Forces and motion: structured theory, worked examples, answered practice, and a mastery checklist for KS3 Year 7.
单元
练习前按清晰顺序掌握本章核心概念。
Choose the body or system, define a positive direction, and mark every force or motion quantity before writing an equation.
A free-body or motion diagram comes before the law. Use resultant force to connect interaction and acceleration.
Vector quantities depend on direction. Keep signs consistent and check that the final unit matches the requested quantity.
For “Contact and non-contact forces”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
For “Weight and mass”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
For “Friction”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
For “Air resistance”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
For “Balanced and unbalanced forces”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.
Physics
逐步查看方法，并理解每一步为何成立。
Velocity changes from 5 m/s to 13 m/s in 4 s. Find the average acceleration.
a = 2 m/s²
Before calculating, explain the key idea from “Contact and non-contact forces” and which conditions must be checked.
The answer should show not only which rule is used for “Contact and non-contact forces”, but also why it is valid here.
Forces and motion
八道分层练习，从基础熟练到考试应用。请先独立完成，再查看提示或答案。
An object travels 90 m in 6 s. Find average speed.
v=s/t.
v = 15.0 m/s.
A 6 kg mass accelerates at 5 m/s². Find resultant force.
F=ma.
F=30 N.
Structure a solution for “Friction”: givens, SI units, law, substitution, and interpretation.
State the law before substituting numbers.
A full solution states symbols/units, selects a valid law for “Friction”, shows substitution and calculation, and interprets the result.
Identify three uncertainty sources in measuring “Air resistance” and improve each one.
Consider instrument resolution, reaction time, repeats, and controls.
A full response links each specific error source to a targeted improvement and identifies random or systematic impact.
Plan a suitable graph for “Balanced and unbalanced forces” data and explain how to obtain a gradient or relationship.
Put the independent variable on x and dependent variable on y.
A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.
Check whether a result for “Distance and time” is sensible using units, order of magnitude, and a limiting case.
A check should not merely repeat the same calculation.
A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.
Connect “Speed = distance / time” to energy conservation or a force/field model and justify the choice.
Define the system and interactions.
A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.
Write a multi-step exam response about “Simple distance-time graphs” with calculation and evaluation.
Separate givens, model, calculation, result, and evaluation.
A full response includes an appropriate diagram/model, laws, algebraic rearrangement, SI substitution, suitably precise result, and evaluation of assumptions.
Forces and motion
六道不同作业，从基础到挑战，包含预计用时、提示和答案指南。
Homework 1: An object travels 240 m in 8 s. Find average speed.
v=s/t.
v = 30.0 m/s.
Homework 2: A 9 kg mass accelerates at 6 m/s². Find resultant force.
F=ma.
F=54 N.
Homework 3: Structure a solution for “Friction”: givens, SI units, law, substitution, and interpretation.
State the law before substituting numbers.
A full solution states symbols/units, selects a valid law for “Friction”, shows substitution and calculation, and interprets the result.
Homework 4: Identify three uncertainty sources in measuring “Air resistance” and improve each one.
Consider instrument resolution, reaction time, repeats, and controls.
A full response links each specific error source to a targeted improvement and identifies random or systematic impact.
Homework 5: Plan a suitable graph for “Balanced and unbalanced forces” data and explain how to obtain a gradient or relationship.
Put the independent variable on x and dependent variable on y.
A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.
Homework 6: Check whether a result for “Distance and time” is sensible using units, order of magnitude, and a limiting case.
A check should not merely repeat the same calculation.
A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.
50 分钟 / 40 分
带计时器、完整分值和参考答案的章节自测。
Start the timer when ready, work without notes, show every step, and open model answers only after finishing.
1. An object travels 160 m in 8 s. Find average speed.
2 分v = 20.0 m/s.
2. A 7 kg mass accelerates at 6 m/s². Find resultant force.
3 分F=42 N.
3. Structure a solution for “Friction”: givens, SI units, law, substitution, and interpretation.
3 分A full solution states symbols/units, selects a valid law for “Friction”, shows substitution and calculation, and interprets the result.
4. Identify three uncertainty sources in measuring “Air resistance” and improve each one.
4 分A full response links each specific error source to a targeted improvement and identifies random or systematic impact.
5. Plan a suitable graph for “Balanced and unbalanced forces” data and explain how to obtain a gradient or relationship.
4 分A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.
6. Check whether a result for “Distance and time” is sensible using units, order of magnitude, and a limiting case.
4 分A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.
7. Connect “Speed = distance / time” to energy conservation or a force/field model and justify the choice.
5 分A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.
8. Write a multi-step exam response about “Simple distance-time graphs” with calculation and evaluation.
5 分A full response includes an appropriate diagram/model, laws, algebraic rearrangement, SI substitution, suitably precise result, and evaluation of assumptions.
9. Compare two methods for investigating “Contact and non-contact forces” and select the more reliable using criteria.
5 分The choice must use at least three comparable criteria and acknowledge one trade-off or limitation.
10. Create an extension question about “Weight and mass”, a prediction, and a data-collection plan.
5 分A full response gives a testable question, justified prediction, independent-variable range, repeats, and an analysis method.
单元
课程参考来源；教学顺序请始终与学校和老师确认。
Physics
KS3 Year 7: 数学与物理的结构化路线，包含章节、练习和下一步。
结构跟随教材，用来帮助组织学习。
通常容易出错或需要更多复习的部分。
从教材、daily material、PDFs、videos 和 worked examples 开始。
进入 full tests 前先做 targeted practice，让覆盖情况更清楚。
如何衡量本章进度，以及何时加入综合 mock。
完成本章后该做什么，以及它如何连接到下一单元。
说明：每学年的正式考试范围请始终以学校、老师和当前官方来源为准。
