Question
A student drew a force diagram for walking their dog. An arrow pointing from left to right shows the student pulling on the leash with a force of 20 N. An arrow from right to left shows the dog pulling on the leash in the opposite direction with a force of 10 N. What is the net force and direction?
A. 5 N to the right
B. 10 N to the right
C. 0 N. The dog does not move
D. 10 N to the left
A. 5 N to the right
B. 10 N to the right
C. 0 N. The dog does not move
D. 10 N to the left
Answers
GPT-4o mini
To find the net force, you can subtract the forces acting in opposite directions.
The student is pulling the leash with a force of 20 N to the right, while the dog is pulling in the opposite direction (to the left) with a force of 10 N.
Net force calculation:
\[
\text{Net force} = \text{Force from the student} - \text{Force from the dog} = 20 \, \text{N (right)} - 10 \, \text{N (left)}
\]
Since the left direction is considered negative and the right direction positive, we can express it as:
\[
\text{Net force} = 20 \, \text{N} - 10 \, \text{N} = 10 \, \text{N \, (to the right)}
\]
Therefore, the net force is 10 N to the right.
The correct answer is **B. 10 N to the right**.
The student is pulling the leash with a force of 20 N to the right, while the dog is pulling in the opposite direction (to the left) with a force of 10 N.
Net force calculation:
\[
\text{Net force} = \text{Force from the student} - \text{Force from the dog} = 20 \, \text{N (right)} - 10 \, \text{N (left)}
\]
Since the left direction is considered negative and the right direction positive, we can express it as:
\[
\text{Net force} = 20 \, \text{N} - 10 \, \text{N} = 10 \, \text{N \, (to the right)}
\]
Therefore, the net force is 10 N to the right.
The correct answer is **B. 10 N to the right**.