Question
Question 36
The graph below represents the relationship between speed and time for a car moving in a straight line.
What is the acceleration of the car?
a
10 m/s2
b
1.0 m/s2
c
0 m/s2
d
0.10 m/s2
Question 37
Shown in the diagram below is path A from point P1 to P2, along which a dog ran. Also shown is an arrow labeled B.
What do A and B represent in the diagram?
a
A represents the displacement the dog traveled, while B is a vector representing the change in position of the dog.
b
A represents the change in position the dog traveled, while B is a vector representing the distance of the dog.
c
A represents the distance the dog traveled, while B is a vector representing the displacement of the dog.
d
A represents the displacement the dog traveled, while B is a vector representing the distance of the dog.
Question 38
David is skateboarding at a speed of 2.5 m/s. How far can he travel on his skateboard in 100 seconds?
\large speed=\frac{distance}{time}
a
250 m
b
0.025 m
c
102.5 m
d
40 m
Question 39
What is the difference between speed and velocity?
a
Velocity has distance.
b
Velocity has direction.
c
Velocity has weight.
d
Velocity has time.
The graph below represents the relationship between speed and time for a car moving in a straight line.
What is the acceleration of the car?
a
10 m/s2
b
1.0 m/s2
c
0 m/s2
d
0.10 m/s2
Question 37
Shown in the diagram below is path A from point P1 to P2, along which a dog ran. Also shown is an arrow labeled B.
What do A and B represent in the diagram?
a
A represents the displacement the dog traveled, while B is a vector representing the change in position of the dog.
b
A represents the change in position the dog traveled, while B is a vector representing the distance of the dog.
c
A represents the distance the dog traveled, while B is a vector representing the displacement of the dog.
d
A represents the displacement the dog traveled, while B is a vector representing the distance of the dog.
Question 38
David is skateboarding at a speed of 2.5 m/s. How far can he travel on his skateboard in 100 seconds?
\large speed=\frac{distance}{time}
a
250 m
b
0.025 m
c
102.5 m
d
40 m
Question 39
What is the difference between speed and velocity?
a
Velocity has distance.
b
Velocity has direction.
c
Velocity has weight.
d
Velocity has time.
Answers
Answered by
GPT-4o mini
Here are the answers to your questions:
**Question 36:** What is the acceleration of the car?
To determine the acceleration from a speed-time graph, you would look at the slope of the line on the graph. If the speed is increasing at a constant rate, the slope is constant. Without the graph, I can't give a precise answer, but if the graph has a straight, upward slope, the acceleration can be calculated using the formula \( \text{acceleration} = \frac{\Delta v}{\Delta t} \).
Assuming that's the case:
- If the slope indicates an increase of speed by 10 m/s over a time interval of 1 second, the answer would be **a) 10 m/s²**.
- If the slope indicates an increase of speed by 1 m/s over a time interval of 1 second, the answer would be **b) 1.0 m/s²**.
- If the speed is constant, the answer would be **c) 0 m/s²**.
- If the slope indicates an increase of speed by 0.1 m/s over a time interval of 1 second, the answer would be **d) 0.10 m/s²**.
**Question 37:** What do A and B represent in the diagram?
Without seeing the diagram, the best answer based on typical definitions is:
- **c) A represents the distance the dog traveled, while B is a vector representing the displacement of the dog.**
(Assuming path A is the actual path taken and displacement vector B points directly from P1 to P2.)
**Question 38:** How far can David travel on his skateboard in 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 **a) 250 m**.
**Question 39:** What is the difference between speed and velocity?
The correct distinction between speed and velocity is:
- Speed is a scalar quantity that only has magnitude, while velocity is a vector quantity that has both magnitude and direction.
Thus, the answer is **b) Velocity has direction.**
**Question 36:** What is the acceleration of the car?
To determine the acceleration from a speed-time graph, you would look at the slope of the line on the graph. If the speed is increasing at a constant rate, the slope is constant. Without the graph, I can't give a precise answer, but if the graph has a straight, upward slope, the acceleration can be calculated using the formula \( \text{acceleration} = \frac{\Delta v}{\Delta t} \).
Assuming that's the case:
- If the slope indicates an increase of speed by 10 m/s over a time interval of 1 second, the answer would be **a) 10 m/s²**.
- If the slope indicates an increase of speed by 1 m/s over a time interval of 1 second, the answer would be **b) 1.0 m/s²**.
- If the speed is constant, the answer would be **c) 0 m/s²**.
- If the slope indicates an increase of speed by 0.1 m/s over a time interval of 1 second, the answer would be **d) 0.10 m/s²**.
**Question 37:** What do A and B represent in the diagram?
Without seeing the diagram, the best answer based on typical definitions is:
- **c) A represents the distance the dog traveled, while B is a vector representing the displacement of the dog.**
(Assuming path A is the actual path taken and displacement vector B points directly from P1 to P2.)
**Question 38:** How far can David travel on his skateboard in 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 **a) 250 m**.
**Question 39:** What is the difference between speed and velocity?
The correct distinction between speed and velocity is:
- Speed is a scalar quantity that only has magnitude, while velocity is a vector quantity that has both magnitude and direction.
Thus, the answer is **b) Velocity has direction.**