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Questions and Answers
Which of the following statements accurately contrasts speed and velocity?
Which of the following statements accurately contrasts speed and velocity?
- Speed is a scalar quantity representing the rate of motion, while velocity is a vector quantity specifying the rate and direction of motion. (correct)
- Speed and velocity are interchangeable terms; they both describe the rate of motion.
- Speed is a vector quantity indicating both magnitude and direction, while velocity is a scalar quantity with magnitude only.
- Velocity is the total distance traveled, whereas speed is the displacement in a given time.
A car travels 120 miles in 2 hours. What is the car's average speed?
A car travels 120 miles in 2 hours. What is the car's average speed?
60 miles/hour
An object accelerates from rest to 20 m/s in 5 seconds. Which formula correctly calculates its acceleration?
An object accelerates from rest to 20 m/s in 5 seconds. Which formula correctly calculates its acceleration?
- $a = v / t$ (correct)
- $a = v * t$
- $a = t / v$
- $a = v + t$
In a distance/time graph, a straight, diagonal line indicates that the object is accelerating.
In a distance/time graph, a straight, diagonal line indicates that the object is accelerating.
Which of the following scenarios would be best represented by a distance/time graph with changing slopes?
Which of the following scenarios would be best represented by a distance/time graph with changing slopes?
If a person walks 3 miles in the first hour and 2 miles in the second hour, what is their average speed over the two hours?
If a person walks 3 miles in the first hour and 2 miles in the second hour, what is their average speed over the two hours?
A 2 kg ball is accelerated at 5 m/s². Calculate the force acting on the ball.
A 2 kg ball is accelerated at 5 m/s². Calculate the force acting on the ball.
If the net force acting on an object is zero, the object must be at rest.
If the net force acting on an object is zero, the object must be at rest.
An object's tendency to resist changes in its state of motion is called ______.
An object's tendency to resist changes in its state of motion is called ______.
Match the following terms with their corresponding units:
Match the following terms with their corresponding units:
Flashcards
Speed vs. Velocity
Speed vs. Velocity
Speed is the rate at which an object is moving. Velocity is the rate at which an object is moving in a specific direction.
Average Speed
Average Speed
Average speed is the total distance traveled divided by the total time taken.
Acceleration
Acceleration
Acceleration is the rate at which an object's velocity changes over time.
Force & Acceleration
Force & Acceleration
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Study Notes
- Speed and velocity are related concepts, but velocity includes direction while speed does not.
- A problem involving speed, distance, and time requires using a formula where if two variables are known, the third can be calculated.
- A problem involving force, mass, and acceleration requires using a formula where if two variables are known, the third can be calculated.
- An accelerating object can be represented on a distance/time graph.
- Distance/time graphs can represent people who change speed over a period of time
- Average speed is the total distance traveled divided by the total time taken.
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