Worksheet on speed, velocity, and acceleration featuring multiple-choice questions with a cartoon illustration of a delivery truck and a person.

Let's solve this step by step. The task is to determine whether each statement describes speed, velocity, or acceleration.

Definitions:

- Speed: How fast an object is moving (a scalar quantity – only magnitude).
- Velocity: Speed in a specific direction (a vector quantity – magnitude and direction).
- Acceleration: The rate at which velocity changes over time (includes speeding up, slowing down, or changing direction).

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Now let’s go through each statement:

1. The motorbike slows down at the stop sign.
→ This involves a change in speed (slowing down), so it's acceleration.
✔ Acceleration

2. A snail can crawl 2 meters in 2 hours.
→ This gives distance and time, but no direction. It's a rate of movement without direction.
✔ Speed

3. A car speeds along a curvy road.
→ "Speeds" means increasing speed, and "curvy road" implies changing direction. But the key word is "speeds" — indicating change in speed. However, since it says "speeds along", it could imply motion with changing speed, but not necessarily specifying direction. Still, the focus is on speed increase.
→ Best answer: Acceleration (because it's speeding up).
✔ Acceleration

4. A train increased its speed as it left the station.
→ Clearly indicates a change in speed (increasing), so it's acceleration.
✔ Acceleration

5. A boat travels north towards China at 10m/s.
→ Includes both speed (10 m/s) and direction (north).
✔ Velocity

6. The divers swim 1km in 1hr.
→ Distance and time are given, but no direction mentioned.
✔ Speed

7. The birds fly south at 15m/s to find warm weather.
→ Speed (15 m/s) and direction (south) are both given.
✔ Velocity

8. Police men travel in all directions across the city to stop coronavirus.
→ This describes movement in various directions, but no specific speed or change in speed. However, "travel in all directions" suggests motion, but doesn't specify how fast or if they're speeding up/slowing down. Since it's about movement without specified speed or change, but mentions multiple directions, we need to consider:
→ No specific speed or rate of change mentioned. It just talks about movement in different directions.
→ But “travel” implies motion — however, without a value or change, it’s more about general motion. But the question asks for one of the three terms.
→ Since there’s no mention of speed or change in speed, and no numerical value, this is likely describing motion in general, but not clearly any of the three. However, since it's about movement without direction specified in a consistent way, and no rate, perhaps best interpreted as speed if we assume they’re moving at some rate, but it's vague.
→ Actually, since it's not giving a rate, nor a change, and the direction is variable ("all directions"), it doesn’t fit perfectly into any category. But since it’s describing movement, and the closest term would be speed if we assume average movement, but no numbers.
→ Wait — the statement does not give a speed, acceleration, or velocity value. So perhaps it's not describing any of them directly? But the task says to choose one.
→ Re-evaluate: "travel in all directions" — no speed or rate given. So it’s not speed, velocity, or acceleration. But maybe it's implying velocity because direction is involved? But multiple directions make it ambiguous.
→ Given the ambiguity, and since no rate is given, this might not be a good example. But in context, likely intended to be speed, assuming they’re moving, but no details.
→ Actually, none of the three are clearly described. But since the question forces a choice, and it's about movement, perhaps the best answer is speed, as a general description of motion.
→ But wait — "travel in all directions" suggests changing direction, which relates to velocity or acceleration?
→ However, no change in speed is mentioned, so not acceleration. Direction is changing, but no velocity vector is defined.
→ Conclusion: Not enough information, but since it must be one, and the focus is on movement, speed is the safest bet.
✔ Speed (but note: weakly supported)

9. It takes your Dad 30 minutes to travel 8 km.
→ Time and distance given. This allows calculation of speed, but no direction.
✔ Speed

10. You lie down to rest and don't move for one hour.
→ No movement. So speed = 0, velocity = 0, acceleration = 0 (since no change in velocity). But the statement describes a state of rest.
→ Since there is no motion, and no change, but the concept being described is lack of motion, which relates to speed (zero speed), or possibly velocity (zero velocity), but technically, speed is the most appropriate here, as it refers to the absence of motion.
→ However, acceleration could also be zero, but the statement isn't about change.
→ Best answer: Speed (as it describes the rate of motion, which is zero).
✔ Speed

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Final Answers:

1. Acceleration
2. Speed
3. Acceleration
4. Acceleration
5. Velocity
6. Speed
7. Velocity
8. Speed *(ambiguous, but best fit)*
9. Speed
10. Speed

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Summary Table:

| # | Statement | Answer |
|---|---------|--------|
| 1 | The motorbike slows down at the stop sign. | Acceleration |
| 2 | A snail can crawl 2 meters in 2 hours. | Speed |
| 3 | A car speeds along a curvy road. | Acceleration |
| 4 | A train increased its speed as it left the station. | Acceleration |
| 5 | A boat travels north towards China at 10m/s. | Velocity |
| 6 | The divers swim 1km in 1hr. | Speed |
| 7 | The birds fly south at 15m/s to find warm weather. | Velocity |
| 8 | Police men travel in all directions across the city to stop coronavirus. | Speed |
| 9 | It takes your Dad 30 minutes to travel 8 km. | Speed |
| 10 | You lie down to rest and don't move for one hour. | Speed |

✔ Answer Key:
1. Acceleration
2. Speed
3. Acceleration
4. Acceleration
5. Velocity
6. Speed
7. Velocity
8. Speed
9. Speed
10. Speed

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