Mr. Rogers' Honors Physics

Syllabus 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter
Fundamentals(1)
1D Motion(2)
Accel Motion(3)
1D Force(4)
 

One Dimensional Force-- Chapter 4
SC Standards :

Indicators

P-2.1 Represent vector quantities (including displacement, velocity, acceleration, and force) and use vector addition.
P-2.2 Apply formulas for velocity or speed and acceleration to one and two-dimensional problems.
P-2.3 Interpret the velocity or speed and acceleration of one and two-dimensional motion on distance-time, velocity-time or speed-time, and acceleration-time graphs.
P-2.4 Interpret the resulting motion of objects by applying Newton’s three laws of motion: inertia; the relationship among net force, mass, and acceleration (using F = ma); and action and reaction forces.
P-2.5 Explain the factors that influence the dynamics of falling objects and projectiles.
P-2.6 Apply formulas for velocity and acceleration to solve problems related to projectile motion. P-2.7 Use a free-body diagram to determine the net force and component forces acting upon an object


   

Practice Test Study Guide

Objectives

Essential Question: Can a force be exerted on an object from a distance without making contact?

Force and Motion

  1. State that force is a vector quantity.

  2. State the SI unit of force. Newton

  3. Add forces in one dimension. They add algebraically.

  4. Note that a net force causes acceleration in the exact same direction as the force.

  5. State the difference between a contact and field force and give examples of each.

  6. field forces: gravity force, magnetic force, electrostatic forces

    contact forces: normal force (from contact with a surface), friction force, tension force (from a rope)

  7. Draw free body diagrams (FBD). An FBD shows the external forces acting on an object.

the object is shown as a box or dot

forces shown as arrows approximately drawn to scale

shows only external forces acting on the object

 

Homefun (formative/summative assessment): Read sections 4.1, do Practice Problems 9, 11, 13 on page 95

 

Formative Assessment: Physics Investigation

Title  
Research Question  
Background  
Hypothesis  
Data, Calculations  
Conclusions  

Follow up Questions

 
Deliverables  
Resources/Materials  

 

 

Essential Question: What causes the sensation of gravity?

Newton's First and Second Laws

  1. State Newton's first law. An object will have constant velocity unless a net force acts on it.

  2. Using Newton's 1st law, explain why it could be disastrous to blow up an enemy spacecraft during a battle in outer space.
  1. Demonstrate a working understanding of inertia. Inertia is the tendency of an object to resist changes in motion when a net force acts on it.

  2. Be aware that in physics mass refers to linear inertial not the amount of matter present.

  3. State Newton's second law both mathematically and in English language.

    F= ma, (Note: this is a special case of Newton's 2nd law in which m = const.)

    acceleration is directly proportional to force and inversely proportional to mass.

  4. Be aware that the weight or gravity force acting on a person = mg. However, "g" is a gravity field strength not necessarily the acceleration due to gravity. A motionless object sitting on the floor still has a gravity force acting on it even though it is not accelerating.

  5. Be aware that a bathroom scale measures normal force and that when standing on a surface the normal force is the force that is directly responsible for the sensation of weight.

  1. Solve elevator force problems. (See figure at right.)

Homefun (formative/summative assessment):

Read section 4.2, do Practice Problems19 and 20 on page 100

Writing Assignment: Write a short explanation of Newton's First Law. State where it does and doesn't apply. The paper should be typewritten. Any illegible papers will be returned.

FBD elevator problem

 

 
Essential Question: Why would a penny dropped from the top of the Empire State building not be likely to kill a person that it hits who is standing on the street?

Terminal Velocity

  1. Explain the cause of air resistance or drag force. Air has mass or inertia. To move an object forward, air has to be moved out of the way and this causes the air to be accelerated which requires a force to do so. The object moving forward causes a force on the air and the air creates an equal and opposite drag force in the opposite direction on the moving object.
  2. Draw the FBD of an object at terminal velocity

  3. State the common methods of modelling air resistance or drag force;

    At low speeds: proportional to velocity

    At high speeds: proportional to velocity squared

  1. State the conditions present during terminal velocity of a falling object (air resistance is present.

    velocity = constant

    acceleration = 0

    drag force + gravity force = 0

  2. State Newton's Third Law in different ways:
    • You can't touch without being touched.
    • Forces always come in pairs that are equal in size but opposite in magnitude
    • For every action there's an equal and opposite reaction

 

Homefun (formative/summative assessment):

Do problems 24 to 26, page 101

Writing Assignment: Write a brief explanation of why dropping a penny off the top of the Empire State Building would or would not be likely to cause a fatality. Support your point of view with research.

 

Essential Question: What does a free falling object look like?

Tension and Normal Forces

  1. Solve one-dimensional acceleration problems involving tension in a rope. Note: we generally assume that ropes have no mass.
  2. Tension in the elevator cable

    Buckets hanging by ropes, one under the other

  3. Determine the normal force acting on an object for one-dimentional problems in which there are one or more additional forces acting on the object. Note that normal force is a force acting perpendicular to the surface that creates it but is NOT always equal to mg. Also note that normal forces are not always just in the vertical dimension.

    Wimpy Bob tries to lift a five gallon bucket full of cement.

    Mean Martha plays a trick on Wimpy Bob as he stands on the weigh scale

Homefun (formative/summative assessment): Read section 4.3 do problems 36-37, page 107

 

Essential Question: How can you best prepare for the test?

Review of Objectives 1- 13 (1-3 days)

Formative Assessments:

  1. State the meaning of Newton's Laws.
  2. Work review problems at the board
  3. Work practice problems.

Metacognition Problem Solving Question: Can I still work the problems done in class, several hours or days later? Some amount of repetition on the exact same problems is necessary to lock in learning. It is often better to thoroughly understand a single example of a problem type than to work example after example understanding none of them completely.

Relevance: Good test preparation is essential to performance in physics class.

Homefun (formative/summative assessment): problems 47and 49, page 75; problems 75, 81, 91, 99, 111 turn in on the day stapled to the back of the test.

Summative Assessment: Unit exam objectives 1-20

 
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Insultingly Stupid Movie Physics is one of the most humorous, entertaining, and readable physics books available, yet is filled with all kinds of useful content and clear explanations for high school, 1st semester college physics students, and film buffs.

It explains all 3 of Newton's laws, the 1st and 2nd laws of thermodynamics, momentum, energy, gravity, circular motion and a host of other topics all through the lens of Hollywood movies using Star Trek and numerous other films.

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