Answer:
She exerts a force of 40 N.
Explanation:
The fact that the ring remains stationary indicates that the forces are in equilibrium.
Let’s denote Jo's force as x.
The equation to consider is
140 = x + 100
x = 40
The string does not experience any force of tension, as it balances two forces acting in the same direction. Hence, the tension is zero.
Explanation:
If tension existed in the string, it would mean that two equal but opposite forces are exerting pull in contrary directions.
When a force of f newtons is applied from the right and another force of f newtons from the left, the resulting action occurs through one force. Because there is action on the same string in opposing directions, the tension in the string can only be equal to the magnitude of the string itself.
Therefore, the string indeed has no tension since it is dealing with two forces acting in the same direction. Thus, the tension is zero.
Answer:
B= 
≅8.06
Explanation:
Applying the Pythagorean theorem:
= 
+ 
Here, C denotes the hypotenuse length, while A and B signify the lengths of the other two sides of the triangle. We can calculate B's length knowing the hypotenuse is 9 and A is 4.
=
+
81= 16+
81-16=
B= ≅8.06
