To solve the problem, we need to calculate the net force acting on each object and determine whether the forces are balanced or unbalanced. Let's go through each scenario step by step.
Example:
- Forces: \( 8 \, \text{N} \) (right), \( 2 \, \text{N} \) (left)
- Net force: \( 8 \, \text{N} - 2 \, \text{N} = 6 \, \text{N} \) (to the right)
- Since the net force is not zero, the forces are
unbalanced.
---
1. Book:
- Forces: \( 10 \, \text{N} \) (up), \( 10 \, \text{N} \) (down)
- Net force: \( 10 \, \text{N} - 10 \, \text{N} = 0 \, \text{N} \)
- Since the net force is zero, the forces are
balanced.
---
2. Tennis Ball:
- Forces: \( 9 \, \text{N} \) (up), \( 4 \, \text{N} \) (down)
- Net force: \( 9 \, \text{N} - 4 \, \text{N} = 5 \, \text{N} \) (upward)
- Since the net force is not zero, the forces are
unbalanced.
---
3. Moving Object (Two Workers):
- Forces: \( 7 \, \text{N} \) (right), \( 5 \, \text{N} \) (left)
- Net force: \( 7 \, \text{N} - 5 \, \text{N} = 2 \, \text{N} \) (to the right)
- Since the net force is not zero, the forces are
unbalanced.
---
4. Lawn Mower:
- Forces: \( 20 \, \text{N} \) (right), \( 2 \, \text{N} \) (left)
- Net force: \( 20 \, \text{N} - 2 \, \text{N} = 18 \, \text{N} \) (to the right)
- Since the net force is not zero, the forces are
unbalanced.
---
5. Parachute:
- Forces: \( 5 \, \text{N} \) (up), \( 17 \, \text{N} \) (down)
- Net force: \( 17 \, \text{N} - 5 \, \text{N} = 12 \, \text{N} \) (downward)
- Since the net force is not zero, the forces are
unbalanced.
---
6. Soccer Players:
- Forces: \( 54 \, \text{N} \) (right), \( 37 \, \text{N} \) (left)
- Net force: \( 54 \, \text{N} - 37 \, \text{N} = 17 \, \text{N} \) (to the right)
- Since the net force is not zero, the forces are
unbalanced.
---
7. Weightlifting:
- Forces: \( 50 \, \text{N} \) (up, left hand), \( 50 \, \text{N} \) (up, right hand), \( 100 \, \text{N} \) (down)
- Net force: \( 50 \, \text{N} + 50 \, \text{N} - 100 \, \text{N} = 0 \, \text{N} \)
- Since the net force is zero, the forces are
balanced.
---
Final Answers:
1.
Book:
- Net force: \( 0 \, \text{N} \)
- Balanced:
Yes
2.
Tennis Ball:
- Net force: \( 5 \, \text{N} \) (up)
- Balanced:
No
3.
Moving Object (Two Workers):
- Net force: \( 2 \, \text{N} \) (right)
- Balanced:
No
4.
Lawn Mower:
- Net force: \( 18 \, \text{N} \) (right)
- Balanced:
No
5.
Parachute:
- Net force: \( 12 \, \text{N} \) (down)
- Balanced:
No
6.
Soccer Players:
- Net force: \( 17 \, \text{N} \) (right)
- Balanced:
No
7.
Weightlifting:
- Net force: \( 0 \, \text{N} \)
- Balanced:
Yes
---
Boxed Final Answer:
\[
\boxed{
\begin{array}{|c|c|c|}
\hline
\text{Object} & \text{Net Force} & \text{Balanced/Unbalanced} \\
\hline
\text{Book} & 0 \, \text{N} & \text{Yes} \\
\hline
\text{Tennis Ball} & 5 \, \text{N} \, (\text{up}) & \text{No} \\
\hline
\text{Moving Object} & 2 \, \text{N} \, (\text{right}) & \text{No} \\
\hline
\text{Lawn Mower} & 18 \, \text{N} \, (\text{right}) & \text{No} \\
\hline
\text{Parachute} & 12 \, \text{N} \, (\text{down}) & \text{No} \\
\hline
\text{Soccer Players} & 17 \, \text{N} \, (\text{right}) & \text{No} \\
\hline
\text{Weightlifting} & 0 \, \text{N} & \text{Yes} \\
\hline
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of balanced unbalanced forces worksheet.
