Introduction to kinematics
Lesson One in the Physics Classroom
Follow the link and complete the lessons one, two, and threeon the far right menu of the web page. You should read all the material and do the concept check activities. Do not just fill in the answers as you go along, you will be tested on this material, even if it is not included on this page.
Scalar and Vectors-
Define scalar and vector, and give three examples of each.
Scalar-
Vector-
1. What is the displacement of the BEHS cross-country team if they begin at the school, run 12 miles away and come back to and finish one mile away from the school at a park? What is their distance traveled?
2. What are the distance and the displacement of the race car drivers in the Daytona 500?
Distance and Displacement-
Define distance and displacement-
Distance-
Displacement-
If I travel from Brigham City to SaltLake and then back to Ogden, what is my displacement? What is my distance? (Assume that SLC is 60 miles from Brigham and that Ogden is in the exact middle)
The term as the crow flies refers to distance, or displacement?
Speed and Velocity-
Define Speed and Velocity-
Speed-
Velocity-
Fill in the blank-
“Velocity is speed with a ______.”
“Speed is a ______quantity” Meaning it ______include direction.
“Velocity is a ______quantity.” Meaning that it ______include direction.
How is average speed calculated? (Include equation)
How is average velocity calculated? (Include equation)
If I travel to St. George which is 250 miles away, four hours, what is my average speed? What is my average velocity if I started the trip in Salt Lake City?
Acceleration-
Define Acceleration-
Describe constant acceleration and give an example-
How do we find the acceleration of an object? (Describe and include the equation)
What are the units of acceleration? Explain how these come about mathematically. (Hint: read the mouse’s mind)
Practice Problems-
Answer the following problems-
If it takes me eight seconds to increase my speed by 24 m/s, what is my acceleration?
If I travel 55 km/h south for five hours, what is my distance covered?
If it takes four hours to cover 800 miles, what is the speed of the airplane?
An ant can cover 500 meters a day (12 hours). What is its average speed in meters/hour?
If the ant in the above problem started at its pile in the morning and returned to its pile at the end of the day, what was its displacement? What is its average velocity? If it took 20 seconds to reach its average speed, what would have been the ants’ acceleration?
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