Physics Honors/AP 1 and 2

Homework

# Physics Chapter 4: 1-4: Force and Newton's Laws of Motion

## Homework

Text Reading: Giancoli, Physics - Principles with Applications, Chapter 4: Sections 1-4

##### Study Points
• 4.1: A force is some push or pull on an object. Forces that change the motion of the object come from OUTISDE the object.
• 4.2: Newton's first law of motion is the law of inertia: an object can't change its own motion. It must be acted on by an outside force. If it is in motion, it will stay in motion indefinitely, with the same speed and direction, until some outside force acts on it.
• 4.3: Mass is the amount of stuff or matter something has. Don't confuse it with weight, which is a force.
• 4.4: Newton's second law of motion tells you that the magnitude of the force depends on the mass and rate of change of the motion (acceleration), and the direction of the force determines the direction of the rate of change. Notice also that an acceleration always means some net force is acting: there is no change without a force.

### Key Equations

Two forms of Newton's second law of motion: and

### Web Lecture

Read the following weblecture before chat: Inertia, Acceleration, and Force

### Study Activity

The website below will either download a Java applet to your computer or run the applet in place, depending on how your browser is configured. You will need Java installed to run the applet locally on your computer.

This Basic Force Demo let's you see the interaction between forces, acceleration, .

 Click to Run

You can set up different scenarios with masses and acceleration, with or without friction. Play with this so that you get a sense of how force, acceleration, and resulting velocity are related.

Physics simulation Java Applets are the product of the PHET Interactive Simulations project at the University of Colorado, Boulder.

### Chat Preparation Activities

• Forum question: The Moodle forum for the session will assign a specific study question for you to prepare for chat. You need to read this question and post your answer before chat starts for this session.
• Mastery Exercise: The Moodle Mastery exercise for the chapter will contain sections related to our chat topic. Try to complete these before the chat starts, so that you can ask questions.

### Chapter Quiz

• The chapter quiz is not yet due.

### Lab Work

If you want lab credit for this course, you must complete at least 12 labs (honors course) or 18 labs (AP students). One or more lab exercises are posted for each chapter as part of the homework assignment. We will be reviewing lab work at regular intervals, so do not get behind!