Units of Measurement
This unit of measurement is commonly used to measure length in the metric system.
What are meters?
This quantity describes the magnitude of an objects' rate of motion.
What is speed?
This is a scalar quantity that measures how fast an object is moving by defining the rate at which its position changes with respect to time.
What is Speed?
This is the fundamental formula to measure this particular scalar quantity, where we measure how fast an object is moving and where the standard unit of measurement is meters per second.
What is speed?
*Remember speed is a scalar quantity that describes the rate at which an object changes its position, calculated as the total distance traveled divided by the time taken. Unlike Velocity, Speed DOES NOT include Direction.
This is a simplified formula commonly used to describe a vector quantity, defined as the rate of change in velocity over time
What is the equation for acceleration, a=v/t or a=Δv/t ?
This unit of measurement is commonly used to measure time in the metric system.
What are seconds?
This quantity describes the magnitude of the total length of the path traveled by the object.
What is distance?
A car is traveling East at 100 meters in 10 seconds. What would be the velocity of the car?
What is velocity of 10 meters per second?
This is the fundamental formula to measure this particular vector quantity, where we measure the rate of change of an object in a specific direction and where the standard unit of measurement is meters per second.
What is velocity?
*Remember Velocity is calculated by dividing an object's displacement (the change in its position) by the time it took for that change to occur.
In physics, scientist often use significant figures, or sig. figs., to indicate the precision of a measurement or quantity. Significant figures follow some crucial rules for expressing the accuracy of a measurement. How many significant figures would you have in this number: 10,000.75
What are 8 significant figures?
This unit of measurement is commonly used to measure mass in the metric system.
What are grams?
This quantity describes the magnitude and direction of an objects' rate of change in position.
What is velocity?
A car accelerates from rest to 20 m/s in 5 seconds. What is its acceleration?
What is the car's acceleration of 4.0 m/s²?
*Remember you must divide velocity by time to get your acceleration!
Describe the difference between the variables 'd' and 'Δx'.
What is Distance being a scalar quantity and Displacement being a vector quantity?
*Remember Distance only gives us magnitude (can be positive or zero) and Displacement gives us magnitude and direction (can be positive, zero or negative) So if you walk 5 meters east and then 5 meters west, you end up back where you started. Therefore, your displacement is zero. The change in your position is zero, even though you walked a total of 10 meters.
Scientific notation is a way to write very large or very small numbers more easily by expressing them as a number between 1 and 10 (the coefficient) multiplied by a power of 10. How would you express five million six hundred thousand in scientific notation?
What is 5.6× 106 ?
This unit of measurement is commonly used to measure velocity in the metric system.
What are meters per second?
This quantity describes the magnitude and direction of an objects' change in position.
What is displacement?
In class, we have learned acceleration only happens when...
What is an object speeding up, slowing down (change in velocity), or changing direction?
*Remember there is no acceleration when velocity is constant! (for example when driving on cruise control)
You have an object's initial velocity, final velocity, and time. What formula can you use to find its average acceleration?
What is aavg= Δt/Δv= Vf-Vi/Tf−Ti?
*where aavg is the average acceleration,Vf is the final velocity, Vi is the initial velocity, Tf is the final time and Ti is the initial time.
I am planning a trip to Disneyworld next summer, it will take me approximately 20 hours to drive to Florida without making any stops. How much time would that be in Seconds?
What are 72000 seconds?
*Remember we can use dimensional analysis to convert hours to minutes and minutes to seconds. (1 hour=60 minutes, 1 minute= 60 seconds)
This unit of measurement is commonly used to measure acceleration in the metric system.
What are meters per second squared?
This is the key differentiation between vector and scalar quantities.
What is direction?
Describe what it means for an object to have negative acceleration. How would this motion look in a VELOCITY v. TIME Graph?
What is an object slowing down?
*Remember a negative acceleration on a velocity-time graph is represented by a line with a negative slope, meaning the line is slanting downwards (velocity is decreasing over time). A negative acceleration on an acceleration-time graph is a horizontal line that is below the time axis in the negative region.
A student walks 20 meters east from the classroom to the library to return a book. After returning the book, they realize they left their backpack in the classroom. They walk 20 meters west to return to the classroom. What can you tell me about the students STARTING position and ENDING position?
What is a Displacement of zero?
*Remember, the student RETURNED the same about of length, they went back to their origin so although they walked 40 meters total distance, their Displacement was ZERO.
A student tosses a basketball straight up into the air. The ball travels upward, reaches its highest point, and then falls back down into the student's hands.
At the exact moment the basketball reaches its highest point in the air, what is its velocity? What is its acceleration?
What is a velocity of 0 m/s and an acceleration of 9.81 m/s2 downwards due to gravity always acting upon the basketball?