Kinematics Flashcards
What is the standard measure for distance/length?
Meter
What is the standard measure for time?
Seconds
What is the standard measure for mass?
Kilogram
In the world of classical mechanics, objects are _________________ and move __________.
Large; Slow
In classical mechanics, all objects are considered ___________________.
Particles
Point-like mass having no real size and a finite mass
Particle
Quantity with magnitude and units that is always positive
Scalar
Quantity with magnitude, units and direction
Vector
T/F Scalar quantities can be positive or negative.
False. Scalar quantities are always positive.
T/F Vector quantities can be positive or negative.
True. Depends on which way you are going.
Total length of path traveled
Distance
Distance is a _______________ value
Scalar
Distance is measured in ______________.
Meters
Total change in position; how far you end up from where you began
Displacement
Displacement is a __________ value
Vector
T/F Displacement can be positive or negative.
True. Displacement is a vector value.
Displacement is measured in __________.
Meters
1 meter is equal to about how many feet?
3.3
The rate at which distance is covered
Speed
Speed is a ________________ value
Scalar
T/F Speed can be either positive or negative.
False. Speed is a scalar value. It is always positive.
Speed and Velocity are both measured in what?
Meters/Second
Average Speed (formula)
v=d/t
Speed=total distance divided by total time
Speed of light
186,000 miles/second
Distance traveled (formula)
d=vt
Distance=speed x time
The rate of change in position, or the rate at which displacement is covered.
Velocity
Velocity is a _____________ quantity.
Vector
T/F: Velocity must be positive.
False. Velocity is a vector quantity, so it can be positive or negative, depending on which way you move.
Velocity is based on what?
Displacement over time
When you change ______________, you change velocity.
Direction
It is nearly impossible to maintain a ___________ _______________, unless we are motionless.
Constant Velocity
Velocity (formula)
v=^x/t
Velocity=displacement over time
One or more velocity is added to another, going in the same direction
Resultant Velocity
On a position vs. time graph, position is on the ____ axis and time is on the ___ axis.
y; x
On a position v. time graph, the slope of the line represents what?
A change in position over a period of time
The slope of the line on a position v. time graph is the __________________ of the object.
Velocity
T/F: Slope/Velocity is CONSTANT.
True.
The rate change in velocity over time
Acceleration
Acceleration (formula)
a=^v/t
Acceleration = change in velocity over time
What are the three accelerators in an automobile?
The gas pedal
The Brake
The Steering Wheel
T/F: Acceleration is getting slower or faster.
False. Acceleration is a change in velocity, whether negative or positive.
Acceleration is a ________________ quantity.
Vector. It has direction.
