Kinematics: Description of Motion
SI STANDARD UNIT OF SPEED
Meters per second.
INSTANTANEOUS SPEED
A quantity describing how fast something is moving at a particular instant of time.
VECTOR QUANTITY
A quantity with both magnitude and direction.
SCALAR QUANTITY
A quantity with only magnitude, or size.
KINEMATICS
Branch of mechanics dealing with the description of the motion of objects, without consideration of what causes the motion.
DYNAMICS
Branch of mechanics that analyzes the causes of motion.
MOTION
Changing position.
INSTANTANEOUS VELOCITY
Describes how fast something is moving and in which direction at a particular instant of time.
OBJECTS IN MOTION SOLELY UNDER THE INFLUENCE OF GRAVITY ARE SAID TO BE IN __________
Free fall.
UNIFORM MOTION
Motion with a constant velocity (constant magnitude and constant direction).
VELOCITY
Quantity describing how fast something is moving and in which direction it is moving.
MECHANICS
The branch of Physics concerned with the study of motion, and what produces and affects motion.
AVERAGE VELOCITY
The displacement divided by the total travel time.
AVERAGE SPEED
The distance, d, traveled, that is, the actual length of the path, divided by the total time elapsed in traveling that distance.
SPEED
The rate at which distance is traveled.
CELESTIAL MECHANICS
The study of motions of heavenly bodies.
REACTION TIME
The time it takes a person to notice, think, and act in response to a situation.
DISTANCE
Total path length traversed in moving from one location to another.
ACCELERATION DUE TO GRAVITY
g = -9.80 m/s^2
DISPLACEMENT
the straight-line distance between two points, along with the direction from the starting point to the final position.
