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Quizzes > High School Quizzes > Science

Speed and Velocity Task Card Quiz

Enhance Mastery With Task Cards And Answer Key

Difficulty: Moderate
Grade: Grade 8
Study OutcomesCheat Sheet
Paper art illustrating a Speed and Velocity Mastery practice quiz for high school physics students.

Easy
What is speed?
Distance traveled per unit time
Displacement per unit time
Acceleration per unit time
Time taken to cover a distance
Speed is defined as the distance traveled divided by the time taken. It is a scalar quantity that measures how fast an object is moving.
Which of the following best describes velocity?
Speed
Velocity, since it includes both magnitude and direction
Distance traveled
Acceleration
Velocity is a vector quantity because it describes both the speed and the direction of an object. The other options do not account for direction.
Which SI unit is commonly used to measure speed?
Meters per second
Kilometers per hour
Miles per hour
Feet per second
The SI unit for speed is meters per second (m/s). Other units are used in different contexts, but m/s is the standard in physics.
What does constant speed mean?
The object's speed remains unchanged over time
The object is at rest
The object's direction remains constant
The object's acceleration is high
Constant speed indicates that the magnitude of the speed does not change over time. However, it does not imply that the direction of motion is constant.
When an object's speed is given as 60 km/h, what does that value represent?
The object covers 60 kilometers in one hour
The object travels 60 kilometers in one minute
The object covers 60 meters in one hour
The object's velocity is 60 m/s
A speed of 60 km/h means that the object travels 60 kilometers in the span of one hour. It is a measure of the rate at which distance is covered.
Medium
An object travels 150 meters in 30 seconds. What is its speed?
5 m/s
4 m/s
6 m/s
7 m/s
Speed is calculated as distance divided by time. Dividing 150 meters by 30 seconds gives a speed of 5 m/s.
A car moves at a constant velocity of 20 m/s for 10 seconds. How far does it travel?
200 m
150 m
180 m
220 m
Distance traveled is the product of velocity and time. Multiplying 20 m/s by 10 seconds yields 200 meters.
An athlete runs a complete lap around a circular track and returns to the starting point. Which quantity is zero after one complete lap?
Distance
Speed
Displacement
Time
Displacement is the straight-line distance from the starting point to the ending point. Since the athlete ends up where they started, their displacement is zero.
Which graph best represents an object moving with constant speed?
A speed vs time graph showing a horizontal line
A speed vs time graph showing a rising line
A displacement vs time graph with a curved line
A displacement vs time graph with a horizontal line
A horizontal line in a speed vs time graph indicates that the speed remains unchanged over time. This is the correct visual representation of constant speed.
If a person travels 90 km north and then 90 km south, what is their average velocity for the entire trip?
0 km/h
90 km/h
45 km/h
180 km/h
Even though the person traveled a considerable distance, their displacement is zero because they returned to the starting point. Therefore, the average velocity, which is based on displacement, is zero.
An object's velocity changes from 10 m/s to 30 m/s in 5 seconds. What is its average acceleration?
4 m/s²
5 m/s²
3 m/s²
6 m/s²
Average acceleration is calculated by dividing the change in velocity by the time interval. (30 m/s - 10 m/s) divided by 5 seconds equals 4 m/s².
Which statement best differentiates speed from velocity?
Speed includes vector direction while velocity does not
Velocity includes vector direction while speed does not
Speed and velocity are identical
Speed includes acceleration while velocity does not
The key difference is that velocity is a vector quantity, meaning it has both magnitude and direction, whereas speed is a scalar that only has magnitude.
In uniform circular motion at constant speed, what type of acceleration is present?
Centripetal acceleration directed toward the center of the circle
Uniform acceleration in the direction of motion
Tangential acceleration
No acceleration is present
Even though the speed remains constant in uniform circular motion, the continuous change in direction results in a centripetal acceleration directed toward the center of the circle.
How do average speed and instantaneous speed differ?
Average speed is the speed at a specific moment, whereas instantaneous speed is the total distance over time
Average speed is the total distance divided by total time, while instantaneous speed is measured at a specific moment
They are identical in all circumstances
Instantaneous speed is always greater than average speed
Average speed is computed over an interval of time, whereas instantaneous speed refers to the speed at a particular moment. This distinction is key in understanding motion.
What does the term 'scalar' mean in relation to physical quantities?
A quantity that has both magnitude and direction
A quantity that has magnitude only
A quantity that has no units
A quantity that is always positive
Scalar quantities are defined solely by their magnitude and do not include a direction. This is in contrast to vector quantities, which possess both magnitude and direction.
Hard
A car accelerates uniformly from rest and reaches a speed of 25 m/s in 10 seconds. What is the distance traveled during this time?
125 m
250 m
100 m
50 m
Using the equation for uniformly accelerated motion from rest, distance = 0.5 × acceleration × time². With acceleration = 25 m/s divided by 10 s (2.5 m/s²), the distance worked out is 0.5 × 2.5 × 100 = 125 m.
A runner maintains a constant speed for the first 20 seconds and then accelerates uniformly to a higher speed over the next 10 seconds. What can be inferred about her average speeds during these intervals?
Her constant speed is equal to her average speed during the acceleration phase
Her constant speed is lower than her average speed during the acceleration phase
Her constant speed is higher than her average speed during the acceleration phase
There is not enough information to compare the speeds
During the acceleration phase, the runner's speed increases from her constant speed to a higher final speed, so the average speed for that phase - being the mean of the initial and final speeds - is higher than her initial constant speed.
A cyclist travels east for 100 m and then north for 100 m in 50 seconds. What is the magnitude of her average velocity?
2.83 m/s
4.00 m/s
2.00 m/s
141.42 m/s
The resultant displacement is the vector sum of 100 m east and 100 m north, yielding a magnitude of √(100² + 100²) ≈ 141.42 m. Dividing this displacement by the total time of 50 seconds gives an average velocity magnitude of approximately 2.83 m/s.
An object's speed remains constant while its direction continuously changes. What type of acceleration does it experience?
There is no acceleration
It experiences tangential acceleration equal to its speed
It has centripetal acceleration directed toward the center of its circular path
It experiences increasing acceleration
Even when speed is constant, a continuous change in direction means there is a change in the velocity vector. This results in centripetal acceleration, which is always directed towards the center of the curvature.
A projectile is launched horizontally from a cliff. Neglecting air resistance, how does its horizontal velocity component behave during its flight?
It increases due to gravitational pull
It decreases due to gravity
It remains constant
It first increases then decreases
In projectile motion without air resistance, no horizontal force acts on the object; only gravity affects the vertical component. Therefore, the horizontal component of the velocity remains constant throughout the flight.
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Study Outcomes

  1. Differentiate between speed and velocity.
  2. Calculate average speed using distance and time data.
  3. Interpret distance-time and velocity-time graphs.
  4. Apply motion equations to solve physics problems.
  5. Analyze real-world scenarios to evaluate acceleration effects.

Speed & Velocity Task Cards Answer Key Cheat Sheet

  1. Speed vs. Velocity - Speed tells you how fast something is moving, while velocity adds direction into the mix. Think of speed as your car's speedometer reading, and velocity as the GPS giving you both speed and heading. Physics Classroom: Speed and Velocity
  2. Average Speed Formula - To find average speed, divide the total distance traveled by the total time taken. It's like calculating your road trip's overall pace instead of checking each mile marker. Math is Fun: Speed & Velocity
  3. Average Velocity - Average velocity considers displacement (the straight-line gap between start and end) divided by time, including direction. It's perfect for figuring out if you really got closer to your destination, not just how many miles you cruised. OpenStax: Time, Velocity, and Speed
  4. Instantaneous Speed - This is the speed at a specific moment, like the exact reading on your speedometer at 60 seconds into the trip. It helps you know exactly how fast you're going right now. Math is Fun: Instantaneous Speed
  5. Instantaneous Velocity - Instantaneous velocity gives you both the speed and direction at a precise instant, like a snapshot of your motion vector. Use it to track quick turns or sudden accelerations. OpenStax: Instantaneous Velocity
  6. Scalars vs. Vectors - Remember: speed is a scalar (just magnitude), and velocity is a vector (magnitude + direction). Mixing them up can lead to major headaches in physics problems! Physics Classroom: Scalars & Vectors
  7. Direction Changes Affect Velocity - Even if your speed stays steady, a turn or loop means your velocity is changing. It's like driving a constant 50 km/h around a curve - you're still accelerating in vector terms. Physics Classroom: Changing Direction
  8. Unit Conversion - Convert m/s to km/h by multiplying by 3.6 (and divide by 3.6 for the reverse). It's a handy trick when mixing SI units with everyday speeds. Math is Fun: Unit Conversion
  9. Relative Motion - Motion depends on your frame of reference: a passenger walking in a moving train appears stationary to someone inside but moves relative to the ground. Always define your observer! Math is Fun: Relative Motion
  10. Displacement vs. Distance - Distance is the total path you travel, while displacement is the straight-line gap between start and end points. For a round trip, distance is nonzero but displacement can be zero! Physics Classroom: Displacement vs Distance
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