Question
Quiz
Question 1 (3 points)
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When a distance-time graph shows a straight horizontal line for distance, that means the car is not moving.
Question 1 options:
true
false
Question 2 (3 points)
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A cyclist slows down at the end of the race. His velocity changes from 2 m/s to 6 m/s during a period of 4 seconds without any change in direction. What was his average acceleration during these 4 seconds?
Question 2 options:
2 m/s2
33 m/s2
1 m/s2
6 m/s2
Question 3 (3 points)
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If the direction changes, it does not affect the acceleration of an object.
Question 3 options:
true
false
Question 4 (3 points)
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If the velocity changes, it does not affect the acceleration of an object.
Question 4 options:
true
false
Question 5 (3 points)
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When a distance-time graph shows a straight horizontal line for distance, that means the car is moving at a constant speed.
Question 5 options:
true
false
0 of 5 questions saved
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Question 1 (3 points)
Listen
When a distance-time graph shows a straight horizontal line for distance, that means the car is not moving.
Question 1 options:
true
false
Question 2 (3 points)
Listen
A cyclist slows down at the end of the race. His velocity changes from 2 m/s to 6 m/s during a period of 4 seconds without any change in direction. What was his average acceleration during these 4 seconds?
Question 2 options:
2 m/s2
33 m/s2
1 m/s2
6 m/s2
Question 3 (3 points)
Listen
If the direction changes, it does not affect the acceleration of an object.
Question 3 options:
true
false
Question 4 (3 points)
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If the velocity changes, it does not affect the acceleration of an object.
Question 4 options:
true
false
Question 5 (3 points)
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When a distance-time graph shows a straight horizontal line for distance, that means the car is moving at a constant speed.
Question 5 options:
true
false
0 of 5 questions saved
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Answers
GPT-4o mini
Let's go through each question:
**Question 1:** When a distance-time graph shows a straight horizontal line for distance, that means the car is not moving.
**Answer:** **true**. A horizontal line on a distance-time graph indicates that there is no change in distance over time, meaning the car is stationary.
---
**Question 2:** A cyclist slows down at the end of the race. His velocity changes from 2 m/s to 6 m/s during a period of 4 seconds without any change in direction. What was his average acceleration during these 4 seconds?
**To calculate average acceleration:**
Average acceleration = (final velocity - initial velocity) / time
= (6 m/s - 2 m/s) / 4 s
= 4 m/s / 4 s
= **1 m/s²**.
**Answer:** **1 m/s²**.
---
**Question 3:** If the direction changes, it does not affect the acceleration of an object.
**Answer:** **false**. If the direction changes, the acceleration can be affected, as acceleration is a vector quantity and depends on both the magnitude and the direction.
---
**Question 4:** If the velocity changes, it does not affect the acceleration of an object.
**Answer:** **false**. Acceleration is defined as the rate of change of velocity; therefore, a change in velocity directly affects the acceleration.
---
**Question 5:** When a distance-time graph shows a straight horizontal line for distance, that means the car is moving at a constant speed.
**Answer:** **false**. A horizontal line indicates the car is not moving at all, rather than moving at a constant speed.
---
Final answers:
1. true
2. 1 m/s²
3. false
4. false
5. false
**Question 1:** When a distance-time graph shows a straight horizontal line for distance, that means the car is not moving.
**Answer:** **true**. A horizontal line on a distance-time graph indicates that there is no change in distance over time, meaning the car is stationary.
---
**Question 2:** A cyclist slows down at the end of the race. His velocity changes from 2 m/s to 6 m/s during a period of 4 seconds without any change in direction. What was his average acceleration during these 4 seconds?
**To calculate average acceleration:**
Average acceleration = (final velocity - initial velocity) / time
= (6 m/s - 2 m/s) / 4 s
= 4 m/s / 4 s
= **1 m/s²**.
**Answer:** **1 m/s²**.
---
**Question 3:** If the direction changes, it does not affect the acceleration of an object.
**Answer:** **false**. If the direction changes, the acceleration can be affected, as acceleration is a vector quantity and depends on both the magnitude and the direction.
---
**Question 4:** If the velocity changes, it does not affect the acceleration of an object.
**Answer:** **false**. Acceleration is defined as the rate of change of velocity; therefore, a change in velocity directly affects the acceleration.
---
**Question 5:** When a distance-time graph shows a straight horizontal line for distance, that means the car is moving at a constant speed.
**Answer:** **false**. A horizontal line indicates the car is not moving at all, rather than moving at a constant speed.
---
Final answers:
1. true
2. 1 m/s²
3. false
4. false
5. false