2.1 Reference Frames and Displacement
2.2 Average Velocity
2.3 Instantaneous Velocity
2.4 Acceleration
Objectives:
1. Students will define and diagram a frame of reference using a set of coordinate
axis.
2. Students will explain the compare and contrast speed, velocity, and instantaneous
velocity.
3. Students will compare and contrast average and instantaneous acceleration.
4. Students will describe the relationship between displacement, velocity and
acceleration.
5. Students will create graphs showing displacement, velocity, and acceleration.
Homework: pp39-401-19 odd.
Formula Search –Find all formulas state the units and purpose for making
calculations.
Vocabulary to Know:
Mechanics
Kinematics
Dynamics
Translational motion
Frame of reference
Coordinate axis
Position
Distance
Displacement
Vectors
Speed
Average Speed
Velocity
Average velocity
Elapsed time
Time interval
Instantaneous velocity
Average acceleration
Instantaneous acceleration
Decelerating
Chapter 2 Introduction:
1. What concepts, does one study in the field of mechanics?
2. Explain translational motion.
2.1 Reference Frames and Displacement:
1. Why is it important to create a frame of reference?
2. How does the use of a coordinate axes help define a frame of reference?
3. Compare and contrast distance and displacement relative to a frame of reference.
4. Why are vectors important for describing motion?
5. Using a coordinate axis, show positive and negative displacement.
2.2 Average Velocity:
1. Compare and contrast average speed and average velocity.
2. How can the sign of the velocity indicate direction?
2.3 Instantaneous velocity:
1. How is instantaneous velocity similar to average velocity?
2. How does a velocity time graph show no acceleration?
2.4 Acceleration:
1. Explain average acceleration.
2. How can an object have positive velocity but negative acceleration?
3. What should be kept in mind when discussing deceleration?
Describing Motion
With Graphs
Directions: Complete the following dot diagrams, vector diagrams, and
graphs.
1. Constant Positive Velocity
2. Constant Negative Velocity
3. Positive Velocity and Positive Acceleration
4. Positive Velocity and Negative Acceleration
5. Negative Velocity and Negative Acceleration
6. Negative Velocity and Positive Acceleration