Question
38. David is skateboarding at a speed of 2.5 m/s. How far can he travel on his skateboard in 100 seconds?
speed = distance/time
A) 0.025 m
B) 102.5 m
C) 250 m
D) 40 m
39. What is the difference between speed and velocity?
a
Velocity has weight.
b
Velocity has direction.
c
Velocity has distance.
d
Velocity has time.
40. An ant on a picnic table travels 30.0 cm to the east, then 15.0 cm to the west. What is the magnitude of the ant's displacement from its original position?
a
15 cm to the east
b
45 cm to the west
c
45 cm to the east
d
15 cm to the west
41. Which statement is correct about the two objects?
a
Objects X and Y are traveling at the same speed.
b
Objects X and Y are speeding up over time.
c
Both are traveling at a constant speed, but Object X is traveling at a faster speed than Object Y.
d
Neither object is traveling at a constant speed, and Object X is traveling at a slower speed than Object Y.
speed = distance/time
A) 0.025 m
B) 102.5 m
C) 250 m
D) 40 m
39. What is the difference between speed and velocity?
a
Velocity has weight.
b
Velocity has direction.
c
Velocity has distance.
d
Velocity has time.
40. An ant on a picnic table travels 30.0 cm to the east, then 15.0 cm to the west. What is the magnitude of the ant's displacement from its original position?
a
15 cm to the east
b
45 cm to the west
c
45 cm to the east
d
15 cm to the west
41. Which statement is correct about the two objects?
a
Objects X and Y are traveling at the same speed.
b
Objects X and Y are speeding up over time.
c
Both are traveling at a constant speed, but Object X is traveling at a faster speed than Object Y.
d
Neither object is traveling at a constant speed, and Object X is traveling at a slower speed than Object Y.
Answers
GPT-4o mini
Let's go through each question step by step.
**Question 38: David's skateboard distance.**
Given:
- Speed = 2.5 m/s
- Time = 100 seconds
Using the formula:
\[ \text{Distance} = \text{Speed} \times \text{Time} \]
\[ \text{Distance} = 2.5 \, \text{m/s} \times 100 \, \text{s} = 250 \, \text{m} \]
So, the answer is:
**C) 250 m**
---
**Question 39: Difference between speed and velocity.**
The primary difference between speed and velocity is that velocity includes direction, while speed does not.
So, the correct answer is:
**b) Velocity has direction.**
---
**Question 40: Ant's displacement.**
The ant's movements:
- Travels 30.0 cm east
- Travels 15.0 cm west
Net displacement can be calculated as:
\[ \text{Displacement} = \text{Distance East} - \text{Distance West} \]
\[ \text{Displacement} = 30.0 \, \text{cm} - 15.0 \, \text{cm} = 15.0 \, \text{cm} \, \text{to the east} \]
So, the answer is:
**a) 15 cm to the east**
---
**Question 41: Statement about two objects.**
Without specific data about the two objects, it's difficult to determine the correct choice. However, assessing the options generally:
- If both objects are traveling at constant speed, option **a** would be true.
- If both are accelerating, option **b** would be true.
- If one is moving faster than the other at constant speeds, option **c** would be true.
- If both are not at constant speed and one object is slower, then option **d** would be true.
Assuming no additional context, we can lean towards recognizing that speed comparison typically involves clearly defined parameters, which aren't present here. Hence, I cannot definitively select an option without additional context on "Objects X and Y."
If there was more context provided regarding their speeds or acceleration, I could help specify the correct answer further.
**Question 38: David's skateboard distance.**
Given:
- Speed = 2.5 m/s
- Time = 100 seconds
Using the formula:
\[ \text{Distance} = \text{Speed} \times \text{Time} \]
\[ \text{Distance} = 2.5 \, \text{m/s} \times 100 \, \text{s} = 250 \, \text{m} \]
So, the answer is:
**C) 250 m**
---
**Question 39: Difference between speed and velocity.**
The primary difference between speed and velocity is that velocity includes direction, while speed does not.
So, the correct answer is:
**b) Velocity has direction.**
---
**Question 40: Ant's displacement.**
The ant's movements:
- Travels 30.0 cm east
- Travels 15.0 cm west
Net displacement can be calculated as:
\[ \text{Displacement} = \text{Distance East} - \text{Distance West} \]
\[ \text{Displacement} = 30.0 \, \text{cm} - 15.0 \, \text{cm} = 15.0 \, \text{cm} \, \text{to the east} \]
So, the answer is:
**a) 15 cm to the east**
---
**Question 41: Statement about two objects.**
Without specific data about the two objects, it's difficult to determine the correct choice. However, assessing the options generally:
- If both objects are traveling at constant speed, option **a** would be true.
- If both are accelerating, option **b** would be true.
- If one is moving faster than the other at constant speeds, option **c** would be true.
- If both are not at constant speed and one object is slower, then option **d** would be true.
Assuming no additional context, we can lean towards recognizing that speed comparison typically involves clearly defined parameters, which aren't present here. Hence, I cannot definitively select an option without additional context on "Objects X and Y."
If there was more context provided regarding their speeds or acceleration, I could help specify the correct answer further.