Let's analyze each of the force diagrams in your image to determine whether the forces are
balanced or
unbalanced, and if unbalanced, what the
resultant force is and what is happening to the object.
---
Diagram 1: Car
- Forces:
- Left: 800 N
- Right: 1000 N
-
Analysis: The forces are not equal. The net force is:
$$
1000\,\text{N} - 800\,\text{N} = 200\,\text{N to the right}
$$
-
Conclusion:
Unbalanced forces → Resultant force =
200 N to the right
-
What’s happening?: The car is
accelerating to the right.
---
Diagram 2: Person Running
- Forces:
- Left: 200 N (probably air resistance or friction)
- Right: 300 N (pushing forward)
-
Analysis: Net force:
$$
300\,\text{N} - 200\,\text{N} = 100\,\text{N to the right}
$$
-
Conclusion:
Unbalanced forces → Resultant force =
100 N to the right
-
What’s happening?: The person is
accelerating forward.
---
Diagram 3: Red Ball (with arrows)
- Forces:
- Up: 200 N (likely tension or upward push)
- Down: 200 N (gravity)
-
Analysis: Equal and opposite forces.
$$
200\,\text{N} - 200\,\text{N} = 0\,\text{N}
$$
-
Conclusion:
Balanced forces
-
What’s happening?: The ball is either
at rest or moving at
constant velocity (no acceleration).
---
Diagram 4: Block on a Surface
- Forces:
- Down: 500 N (weight)
- Up: 500 N (normal force)
- Right: 100 N (applied force)
- Left: 100 N (friction)
-
Analysis:
- Vertical: 500 N up vs. 500 N down → balanced
- Horizontal: 100 N right vs. 100 N left → balanced
- Net force = 0 N
-
Conclusion:
Balanced forces
-
What’s happening?: The block is
not accelerating — it may be at rest or moving at constant speed.
---
Diagram 5: Table with Weight
- Forces:
- Down: 100 N (weight of table)
- Up: 100 N (support from ground)
-
Analysis: Equal and opposite forces → net force = 0 N
-
Conclusion:
Balanced forces
-
What’s happening?: The table is
stationary or moving at constant velocity.
---
Diagram 6: Sled on Incline
- Forces:
- Down the slope: 400 N (component of gravity)
- Up the slope: 300 N (pulling force)
-
Analysis: Net force along the slope:
$$
400\,\text{N} - 300\,\text{N} = 100\,\text{N down the slope}
$$
-
Conclusion:
Unbalanced forces → Resultant force =
100 N down the slope
-
What’s happening?: The sled is
accelerating down the slope.
---
✔ Summary Table:
| Diagram | Balanced/Unbalanced | Resultant Force | What’s Happening |
|--------|---------------------|------------------|-------------------|
| 1 (Car) | Unbalanced | 200 N → right | Accelerating right |
| 2 (Person) | Unbalanced | 100 N → right | Accelerating forward |
| 3 (Ball) | Balanced | 0 N | Constant velocity or at rest |
| 4 (Block) | Balanced | 0 N | No acceleration |
| 5 (Table) | Balanced | 0 N | Stationary or constant velocity |
| 6 (Sled) | Unbalanced | 100 N ↓ slope | Accelerating down slope |
---
Final Answer:
You should label each diagram as follows:
1.
Unbalanced, resultant force:
200 N to the right, object is
accelerating to the right
2.
Unbalanced, resultant force:
100 N to the right, object is
accelerating forward
3.
Balanced, no resultant force, object is
in equilibrium (rest or constant velocity)
4.
Balanced, no resultant force, object is
not accelerating
5.
Balanced, no resultant force, object is
stationary
6.
Unbalanced, resultant force:
100 N down the slope, object is
accelerating down the slope
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Parent Tip: Review the logic above to help your child master the concept of force diagrams worksheet.
