Does the speedometer of a car read average or instantaneous speed? How do you know?
Instantaneous Speed
It changes throughout the drive.
If the speedometer of your car reads at a constant speed of 40km/hr, can you say 100% for sure that the car has a constant velocity?
No - You may be changing directions.
What control on a car causes a change is speed?
The Brake and gas pedals.
What control on a car causes a change in velocity?
The Brake pedal, gas pedal, and the steering wheel.
What is the acceleration of a car that travels with a constant velocity?
0
Describe a situation in which you can accelerate even though your speed doesn't change.
You change direction.
What is the equation for speed?
S = D / T
What is the equation for Velocity?
V = D / T
What is the difference between speed and velocity?
Velocity has direction, speed doesn't.
What is the equation for Acceleration?
A = (VF - VI) / T
Define "per".
for each
What is the abbreviation for meters per second?
m/sec
What is the abbreviation for kilometers per hour?
km/h
What is the abbreviation for centimeters per second?
cm/sec
What is the abbreviation for miles per hour?
mph
What is the abbreviation for inches per second?
ips
in/sec
What is the abbreviation for feet per minute?
fpm
ft/min
Define ''Position''.
where something is compared with where it started, including the direction it has moved.
Define "Distance".
an interval of length without regard to direction
In a position vs. time graph, an increase in position over an increase in time represents what?
the object moving away from the start
In a position vs. time graph, a decrease in position over an increase in times represents what?
the object moving towards the start
In a position vs. time graph, a constant position over an increase in time represents what?
the object not moving
Define "Instantaneous Speed''.
the speed at a specific point in an object's journey
Define ''Average Speed".
the average speed of an objects journey.
Define "Acceleration".
the rate at which an object speeds up.