The Basics
Motion
Calculations
Graphing
100
This has both a magnitude and a direction.
What is a vector?
100
If speed is the scalar version, this is the vector version.
What is velocity?
100
A boat travels straight down a river at a speed of 15 m/sec. If the boat travels a distance of 34.1 km, how long was the boat ride?
What is 2.3e3 seconds, or 38 minutes?
100
From the chart below, this is the time that the car changes direction.
What happens between 6 and 7 seconds?
200
A scalar quantity is missing this.
What is a direction?
200
Velocity is the rate of change of this value over time.
What is displacement?
200
A plane flies straight for 672.1 km and then turns around and heads back. The plane then lands at an airport that is only 321.9 km away from where the pilot turned around. If the plane's average velocity over the entire trip was 42 m/sec, this is how much time the entire trip took.
What is 8.3e3 seconds, or 2.3 hours?
200
From the chart below, this is when the car is traveling the fastest.
What happens between 5 and 6 seconds?
300
This is the main difference between instantaneous and average velocity.
Why does average velocity use a finite time interval while instantaneous velocity use an infinitesimally small time interval?
300
Because we must have a frame of reference, physicists say that velocity is ________ .
What is "relative"?
300
A sprinter starts from rest and, in 3.4 seconds, is traveling with a velocity of 16 m/sec east. This is the sprinter's acceleration.
What is 4.7 m/sec^2 east?
300
From the chart below, this is when the runner is slowing down.
What happens between 0 and 7 seconds, and again from 12 to 20 seconds?
400
This is how you would write 4,500 meters in scientific notation, assuming you measured exactly 4,500 meters.
What is 4.500 x 10^3?
400
This is why an object's acceleration doesn't have to be zero if the velocity is zero.
What happens if acceleration is changing an object's direction such that the velocity is momentarily zero?
400
A race car accelerates at -7.2 m/sec^2 when the brakes are applied. If it takes 3.1 seconds to stop the car when the brakes are applied, this is how fast the car was originally going.
What is 22 m/sec?
400
From the chart below, this is when the runner's acceleration is zero.
What happens at 6 seconds, and again at 12 seconds?
500
This is why "4 meters east" is the same thing as "-4 meters west".
What happens when directions are defined in the opposite way?
500
When you see a measurement like 12.3 m/sec^2, you know it's this type of quantity.
What are the units acceleration?
500
A delivery truck travels down a straight highway for 35.4 km to make a delivery. On the way back, the truck has engine trouble, and the driver is forced to stop and pull off the road after traveling only 13.2 km back towards its place of business. This is how much distance the driver covered.
What is 48.6 km?
500
This is how we remember the equation for the slope of a line.
What is "rise over run"?