Kinematics Quiz Flashcards
What are the 2 parts of mechanics?
Kinematics and dynamics
The description of how objects move through space and time
Kinematics
Deals with force and why objects move as they do
Dynamics
Moving without rotating
Translational motion
Objects that move along a straight-line path
One dimensional translational motion
A point that has no size and can only undergo translational motion
Particle
Measurements like position, distance, or speed need this “with respect to”
Reference frame
A change in position of an object; how far the object is from its starting point
Displacement
Magnitude and direction; displacement has it
Vectors
Vectors that point in one direction have a
Positive sign
Vectors that point in the opposite direction have a
Negative sign
How far an object travels in a given time interval no matter the direction
Speed
The total distance traveled along its path divided by the time it takes to travel this distance
Average speed
Refers to both the magnitude of how fast an object is moving and the direction in which it is moving; measured in vectors
Velocity
Defined in terms of displacement
Velocity
Average speed and average velocity have the same magnitude when the motion is
All in one direction
Time that has passed during chosen period of observation
Elapsed time
Velocity at any instant of time
Instantaneous velocity
If an object moves at a constant velocity during the time interval then it’s instantaneous velocity is
The same as its average velocity
Changing velocity, specifies how rapidly the velocity of an object is changing
Acceleration
The change in velocity divided by the time taken to make this change
Average acceleration
The study of the motion of objects and the related concept of force and energy form this
Mechanics
