Lever types worksheet - Free Printable

Let's solve this step-by-step. The task is to identify the Effort (E), Resistance (R), and Fulcrum (F) for each tool or situation shown in the image, and then classify each as a Class 1, 2, or 3 lever based on their positions.

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🔷 Lever Classes Overview:

- Class 1 Lever: Fulcrum (F) is between Effort (E) and Resistance (R).
→ Example: seesaw
- Class 2 Lever: Resistance (R) is between Fulcrum (F) and Effort (E).
→ Example: wheelbarrow
- Class 3 Lever: Effort (E) is between Fulcrum (F) and Resistance (R).
→ Example: tweezers

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Now let’s go through each image:

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Row 1

#### 1. Scissors
- Fulcrum (F): Pivot point where the two blades meet.
- Effort (E): Applied by fingers on the handles.
- Resistance (R): Material being cut at the blade tips.
- Order: E – F – R → Class 1

✔ Class 1

#### 2. Nutcracker
- Fulcrum (F): Hinge point of the nutcracker.
- Effort (E): Applied by hands squeezing the handles.
- Resistance (R): Nut in the middle.
- Order: E – F – R → Wait! Actually, F is at hinge, R is in the middle, E is at ends → So: F – R – E
- That means Resistance is between Fulcrum and Effort → Class 2

✔ Class 2

#### 3. Corkscrew (cork puller)
- Fulcrum (F): The pivot point at the base of the lever arm.
- Effort (E): Applied at the end of the handle.
- Resistance (R): The cork in the bottle.
- Order: F – R – E → Resistance between fulcrum and effort → Class 2

✔ Class 2

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Row 2

#### 4. Tweezers
- Fulcrum (F): At the tip where the two arms meet.
- Effort (E): Applied by fingers at the ends.
- Resistance (R): Object being held at the tip.
- Order: E – F – R → Effort at one end, resistance at the other, fulcrum in middle → Class 1?
Wait: Actually, fulcrum is at the top (tip), effort applied at the ends, resistance at the tip → But wait — the fulcrum is at the top, effort at the bottom, resistance at the tip → so: E – R – F?

No — actually, tweezers have fulcrum at the top (where they pivot), effort applied at the fingers (middle), and resistance at the tip.

So:
- Fulcrum (F): Top joint
- Effort (E): Fingers squeeze in the middle
- Resistance (R): Object at the tip

→ Order: F – E – R → Effort between Fulcrum and Resistance → Class 3

✔ Class 3

#### 5. Bottle opener
- Fulcrum (F): The edge that rests on the bottle cap.
- Effort (E): Applied at the end of the opener.
- Resistance (R): The cap being lifted.
- Order: F – R – E → Resistance between fulcrum and effort → Class 2

✔ Class 2

#### 6. Wheelbarrow
- Fulcrum (F): The wheel axle.
- Resistance (R): Load in the tray.
- Effort (E): Applied at the handles.
- Order: F – R – E → Resistance between fulcrum and effort → Class 2

✔ Class 2

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Row 3

#### 7. Broom
- Fulcrum (F): Hand near the bottom (pivot point).
- Effort (E): Applied by hand at the top.
- Resistance (R): Dirt on the floor being swept.
- Order: F – R – E → Resistance between fulcrum and effort → Class 2

Wait — but actually, when sweeping, the hand at the bottom acts as fulcrum, the top hand applies effort, and the broom head pushes dirt → so:
- Fulcrum: Lower hand
- Effort: Upper hand
- Resistance: Ground/dirt

→ So order: F – R – E → Class 2

✔ Class 2

#### 8. Man using a crowbar to lift a rock
- Fulcrum (F): Point where the crowbar touches the ground.
- Effort (E): Applied at the end of the bar by the man.
- Resistance (R): The rock being lifted.
- Order: F – R – E → Resistance between fulcrum and effort → Class 2

✔ Class 2

#### 9. Bicycle brake lever
- Fulcrum (F): Pivot point of the lever.
- Effort (E): Applied by finger on the lever.
- Resistance (R): Cable tension pulling back.
- Order: F – E – R → Effort between fulcrum and resistance → Class 3

✔ Class 3

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Row 4

#### 10. Shovel digging
- Fulcrum (F): The point where the shovel hits the ground.
- Effort (E): Applied by hands pushing down on the handle.
- Resistance (R): Soil being dug up.
- Order: F – R – E → Resistance between fulcrum and effort → Class 2

✔ Class 2

#### 11. Fishing rod
- Fulcrum (F): The hand holding the rod near the base.
- Effort (E): Applied by the angler pulling up on the rod.
- Resistance (R): Fish pulling at the line.
- Order: F – E – R → Effort between fulcrum and resistance → Class 3

✔ Class 3

#### 12. Seesaw (teeter-totter)
- Fulcrum (F): Central pivot point.
- Effort (E): One child's weight.
- Resistance (R): Other child's weight.
- Order: E – F – R → Fulcrum in middle → Class 1

✔ Class 1

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✔ Final Answers Table:

| Image | Effort (E) | Resistance (R) | Fulcrum (F) | Lever Class |
|-------|------------|----------------|-------------|-------------|
| 1. Scissors | Handles | Blade tips | Pivot | 1 |
| 2. Nutcracker | Handles | Nut | Hinge | 2 |
| 3. Corkscrew | Handle end | Cork | Base pivot | 2 |
| 4. Tweezers | Fingers (middle) | Tip (object) | Top joint | 3 |
| 5. Bottle opener | End of opener | Cap | Edge on bottle | 2 |
| 6. Wheelbarrow | Handles | Load | Wheel | 2 |
| 7. Broom | Top hand | Dirt | Bottom hand | 2 |
| 8. Crowbar | End of bar | Rock | Ground contact | 2 |
| 9. Brake lever | Finger | Cable | Pivot | 3 |
| 10. Shovel | Hands | Soil | Ground contact | 2 |
| 11. Fishing rod | Rod (pulling) | Fish | Hand grip | 3 |
| 12. Seesaw | One child | Other child | Center pivot | 1 |

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📌 Summary of Lever Classes:

- Class 1: Scissors, Seesaw → 2 tools
- Class 2: Nutcracker, Corkscrew, Bottle opener, Wheelbarrow, Broom, Crowbar, Shovel → 7 tools
- Class 3: Tweezers, Brake lever, Fishing rod → 3 tools

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Let me know if you'd like this formatted into a printable table!