AP Physics 1 Free Response Question on Momentum

. These are longer questions, so grab some paper and a pencil, or open up a blank page on your computer. After you finish, you can see how you did with 

⏱ The AP Physics 1 exam has 5 free-response questions, and you will be given 90 minutes to complete the FRQ section. (This means you should 

Identical Blocks 1 and 2 are placed on a horizontal surface at points A and E, respectively, as shown. The surface is frictionless except for the region between points B and C, where the surface is rough. Beginning at time tA, Block 1 is pushed with a 

 horizontal force from Point A to Point B by a mechanical plunger.

Upon reaching Point B, Block 1 loses contact with the plunger and continues moving to the right along the horizontal surface toward Block 2. Block 1 collides with and sticks to Block 2 at Point E, after which the two-block system continues moving across the surface, eventually passing Point F.

 of the two-block system as a function of time, from time tA until the blocks pass Point F at time tF. The times at which Block 1 reaches Points A through F are indicated on the time axis.



The system is reset and Block 1 is again released. The following conditions now exist:


In addition, there is no friction on the horizontal surface except for between letters B and C.

(i) Determine the speed of Block 1 at Point B.

(ii) Determine the speed of Block 1 at Point D.

(i) Was momentum and/or energy conserved from Point D 

? Briefly explain your reasoning for EACH.

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Unit 3 – Circular Motion & Gravitation

Dig deeper into the different forms of energy in unit 4 of AP Physics 1. Explore important concepts like open & closed systems, work, power, kinetic energy, gravitational potential energy, elastic potential energy, mechanical energy, thermal energy, Law of Conservation of Energy, and much more to master the AP Physics 1 exam!

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Keep up the momentum in unit 5 of AP Physics 1. Review linear & angular momentum, impulse, thrust force, changes in momentum problems, momentum in open & closed systems, elastic & inelastic collisions, center of mass, conservation of linear momentum through our helpful guides and practice questions!

Unit 5 – Momentum

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Unit 6 – Simple Harmonic Motion

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Unit 7 – Torque & Rotational Motion

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Multiple Choice Questions (MCQs)

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Free Response Questions (FRQs)

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Unit 1 Overview: Kinematics

🔑 Key Concepts 

Key Equations 

Frames of Reference 👨‍💻

Position 🌎

Scalar vs. Vector Quantities 💫

Displacement vs. Distance 🚴‍♀️

Speed vs. Velocity 🏇

Position, Velocity, and Acceleration

Understanding Representations of Motion

Center of Mass

4.A.1 Essential Knowledge ➡️

4.A.2 Essential Knowledge ⏰

Graphical Representations of Motion 📈

Mathematical Representations of Motion 📍

Free Fall ⚽️

Projectile Motion ☄️

Angled Motion 🏹

Representations of Motion

Multiple Choice Practice for Kinematics

Multiple Choice Questions

Answers and Review for Multiple Choice Practice on Kinematics

MC Answers and Review

2.0 Unit 2 Overview: Dynamics

Applicable Big Ideas 💨

2.1 Systems

2.2 The Gravitational Field

2.3 Contact Forces

2.4 Newton's First Law

2.5 Newton's Third Law and Free Body Diagrams

2.6 Newton's Second Law

2.7 Applications of Newton's Second Law

Unit 2 Overview: Dynamics

What is a System? 🌏

Properties of a System 🌟

Systems

Gravitational Fields and Weight⬇️

The Gravitational Field

Types of Contact Forces ⛓

 Contact Forces

Newton's First Law of Inertia 🐘


Gravitational vs Inertial Mass 🐁

Newton's First Law

Force Vectors ➡️

Force Interactions 🛠

Force Pairs 🤝

Newton's Third Law and Free-Body Diagrams

Newton's Second Law 🛫

Free-body Diagrams 🌐

Newton's Second Law

Linear Motion of a System ➰

Important Acceleration Formulas 🗯

Angular Tension and Apparent Weight 🔊

When acceleration is upwards

When acceleration is downwards

When there is no acceleration

When an elevator is in free fall

Applications of Newton’s Second Law

Multiple Choice Practice for Dynamics

Answers and Review for Multiple Choice Practice on Dynamics

Applicable Big Ideas 

Key Concepts 

Key Equations 

3.1 Vector Fields

3.2 Fundamental Forces

3.3 Gravitational and Electric Forces

3.4 Gravitational Field/Acceleration Due to Gravity on Different Planets

3.5 Inertial vs. Gravitational Mass

3.6 Centripetal Acceleration and Centripetal Force

3.7 Free-Body Diagrams for Objects in Uniform Circular Motion

3.8  Applications of Circular Motion and Gravitation

Multiple Choice Practice for Circular Motion and Gravitation

Answers and Review for Multiple Choice Practice on Circular Motion and Gravitation

Learning Targets

Uniform Circular Motion

Vector Field Between Two Objects

Vector Fields

Gravitational Forces 

The Four Fundamental Forces

Gravitational Domination

Fundamental Forces

Gravitational Force

Newton's Universal Law of Gravitation 

Practice Problems

Gravitational and Electric Forces

Overview

Gravitational Field 

Gravitational Field/Acceleration Due to Gravity on Different Planets

Learning Targets 

Inertial Mass 

Gravitational Mass

Gravitational Mass vs. Inertial Mass

Inertial vs. Gravitational Mass

Important Equations

Centripetal Acceleration

Velocity

Centripetal Force

Practice Questions

Centripetal Acceleration and Centripetal Force

Free Body Diagram Basics

FBDs for Uniform Circular Motion

Roller Coaster FBD 

Free-Body Diagrams for Objects in Uniform Circular Motion

Frames of Reference

Key Concept: Frame of Reference

Rotational Velocity and Acceleration:

Rotational Kinematics:

Force Vectors 

Key Vocabulary: Vector

Force Interactions 

Newton's Third Law 

Applications of Circular Motion and Gravitation

Answers and Review for Multiple Choice Practice on Energy

Multiple Choice Practice for Energy

Applicable Big Ideas

Key Concepts 🔑

Key Equations 🗝 

Unit 4 Overview: Energy

Conservation Laws 👨‍💻

Total Energy Changes 👨‍💻

Systems vs Objects 💡

Force Interactions💡

What’s a System?

Work, Work, Work

Power

Open and Closed Systems: Energy

Changes in Kinetic Energy

Changes in Total Energy 

Forces Can Change Kinetic Energy 

Work and Mechanical Energy 

Kinetic Energy

Gravitational Potential Energy

Elastic Potential Energy

Thermal Energy

Work and Mechanical Energy

Law of Conservation of Energy👨‍💻

The Work-Energy Principle

Conservation of Energy, the Work-Energy Principle, and Power

Momentum

Impulse

Momentum and Impulse

Two Object Problems

Interpreting Different Scenarios

Representations of Changes in Momentum

Closed Systems vs. Open Systems

Momentum of a System

Open and Closed Systems: Momentum

Types of Collisions

Inelastic Collisions

Elastic Collisions 

Conservation of Linear Momentum

Multiple Choice Practice for Momentum

Unit 5 FRQ (Momentum)

Mass of Block 1 (kg)	Mass of Block 2 (kg)	Spring Constant (N/m)	Distance between each letter (m)	Coefficient of Friction (𝜇)
5	3	825	1.2	0.15

	Conserved	Not Conserved
Momentum
Energy

Unit 5 FRQ (Momentum)

AP Physics 1 🎡

AP Physics 1 Free Response Question on Momentum

Setup

Questions

Part A

Part B

Part C

Answers & Rubric

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