Ch. 1 Concepts Of Motion Flashcards
The change of an object’s position with time.
Motion
What are the four types of motion?
- Linear
- Circular
- Projectile
- Rotational
Linear, circular, and projectile motion—in which the object moves through space are called?
Translational motion
The path along which the object moves, whether straight or curved, is called the object’s:
Trajectory
An image, showing an object’s position at several equally spaced instants of time is called a:
Motion diagram
A highly simplified picture of reality, but one that still captures the essence of what we want to study is a:
Model
An object that can be represented as a mass at a single point in space is called a:
Particle
A simplification in which we treat a moving object as if all of its mass were concentrated at a single point
Particle model
An arrow from the origin to the point representing an object is called a:
Position vector
A single number (with a unit) that describes a physical quantity is called a:
Scalar
A quantity having both a size and a direction is called a:
Vector
The size or length of a vector is called its:
Magnitude
The vector showing the position changes of an object are called:
Displacement
The displacement of a vector from an initial position to a final position is:
Delta_r=r_f-r_i
Total distance divided by time interval spent traveling.
Average speed
In addition to measuring how fast an object moves, this ratio is a vector that points in the direction of motion
Average velocity
The change in velocity over during a time interval is called:
Average acceleration
The average acceleration vector points in the same direction as:
The displacement velocity vector.
An object is speeding up iff:
It’s velocity and acceleration point in the same direction.
An object is slowing down iff:
The object’s velocity and acceleration point in opposite directions.
An object’s velocity is constant iff:
It’s acceleration is zero.
A change in velocity, no matter what the change is, and not just to speeding up is called:
Acceleration
Giga (G)
10^9
Mega- (M)
10^6
