What is the average speed of an athlete who runs 1000 m in 2 minutes ？
2 answers:
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The resultant force on the box is C) 10 Newtons to the left.
Explanation:
The figure of the problem is attached.
We see that there are two forces acting on the box along the horizontal direction:
- A force of 10 N acting to the right
- A force of 20 N acting to the left
By taking "to the right" as positive direction, we can rewrite the two forces as follows:
Where the second force is negative since it acts to the left.
Since the two forces are in line, we can find their resultant simply by calculating their algebraic sum. By doing so, we find:
And the negative sign tells us that the direction is to the left.
Therefore, the correct answer is
C) 10 Newtons to the left.
Learn more about forces here:
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