Here's the complete solution to both parts of the worksheet:
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A. Label the following parts of a fixed pulley.
Based on the diagram and standard pulley terminology:
1.
Support / Frame / Bracket — This is the structure that holds the pulley wheel in place, attached to the ceiling or beam.
2.
Load (or Bucket) — The object being lifted (in this case, a bucket).
3.
Pulley Wheel (or Sheave) — The circular wheel with a groove that rotates as the rope moves over it.
4.
Rope (or Cable) — The flexible material that runs over the pulley wheel.
5.
Groove — The channel or凹槽 around the edge of the pulley wheel where the rope sits to prevent slipping.
✔ So, the correct labels are:
-
1 → Support / Frame
-
2 → Load
-
3 → Pulley Wheel
-
4 → Rope
-
5 → Groove
*(Note: Depending on curriculum level, “Frame” or “Bracket” may be acceptable for #1; “Sheave” is more technical but “Pulley Wheel” is commonly used in elementary science.)*
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B. Fill in the blanks with the correct answers.
Given words:
*turn, move upwards, load, simplifies, groove*
Sentence:
What will happen when the rope is pulled?
1. The
groove at the wheel will
2.
turn.
3. The
load connected to the rope will
4.
move upwards.
5. The fixed pulley
simplifies the work to lift the load.
✔ Final filled-in sentences:
> 1. The
groove at the wheel will
> 2.
turn.
> 3. The
load connected to the rope will
> 4.
move upwards.
> 5. The fixed pulley
simplifies the work to lift the load.
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💡 Explanation:
- A
fixed pulley changes the direction of the force applied — you pull down to lift something up.
- It does
not reduce the amount of force needed (no mechanical advantage), but it
simplifies the task by allowing you to use your body weight or stand in a convenient position.
- When you pull the rope, the
groove in the wheel allows the rope to roll smoothly, causing the
wheel to turn.
- As the rope is pulled, the
load attached to the other end rises — it
moves upwards.
- The pulley makes lifting easier to manage — hence, it
simplifies the work.
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✔ Final Answers Summary:
A. Labels:
1. Support / Frame
2. Load
3. Pulley Wheel
4. Rope
5. Groove
B. Blanks:
1. groove
2. turn
3. load
4. move upwards
5. simplifies
Let me know if you’d like a printable version or a diagram explanation!
Parent Tip: Review the logic above to help your child master the concept of pulley worksheet.
