Question

speed, velocity, and acceleration dok level questions vocabulary section
directions: define each term in your own words using the reading material.

dok level 1 questions (recall & recognition)

1. what is the formula for calculating speed?
2. list three units used to measure speed.
3. what is the difference between distance and displacement?
4. true or false: velocity includes both speed and direction.

Explanation:

• Speed: A scalar quantity representing how fast an object is moving. It is calculated as the distance traveled divided by the time taken.
• Velocity: A vector quantity that includes both the speed of an object and its direction of motion.
• Acceleration: The rate at which an object's velocity changes over time. It can be a change in speed, direction, or both.
• Average Speed: The total distance traveled divided by the total time taken for a journey.
• Instantaneous Speed: The speed of an object at a specific moment in time.
• Distance: A scalar quantity that refers to "how much ground an object has covered" during its motion.
• Displacement: A vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
• Direction: The path that an object is moving along (e.g., north, south, east, west, or a combination like northeast).

For the DOK Level 1 questions:

1. The formula for calculating speed is \( speed=\frac{distance}{time} \).
2. Three units used to measure speed could be meters per second (\( m/s \)), kilometers per hour (\( km/h \)), and miles per hour (\( mph \)).
3. Distance is a scalar (only magnitude - how much ground covered), while displacement is a vector (magnitude and direction - overall change in position).
4. Velocity is a vector, so it includes both speed (magnitude) and direction. So the statement "Velocity includes both speed and direction" is True.

Answer:

Term	Definition
Velocity	A vector quantity; speed with direction.
Acceleration	Rate of change of velocity.
Average Speed	Total distance / total time.
Instantaneous Speed	Speed at a specific moment.
Distance	Total ground covered (scalar).
Displacement	Overall change in position (vector).
Direction	Path of motion (e.g., north).

1. \( speed=\frac{distance}{time} \)
2. \( m/s \), \( km/h \), \( mph \)
3. Distance is scalar (only magnitude), displacement is vector (magnitude + direction).
4. True