Looking at the oar in a boat diagram, I can identify:
- Part ① is located at the handle where the person is gripping and applying force to the oar.
- Part ② is at the oarlock (the pivot point) where the oar rotates against the side of the boat.
- Part ③ is at the blade of the oar that is in the water, which encounters resistance as it pushes against the water.
In lever terminology:
- The fulcrum is the pivot point - this would be part ② (the oarlock).
- The effort is where force is applied - this would be part ① (the handle).
- The load is where the resistance is encountered - this would be part ③ (the blade in the water).
Since the fulcrum (②) is between the effort (①) and the load (③), this is a first-class lever.
Now I have analyzed all six tools. Let me summarize my findings:
1. Scissors: Fulcrum = ②, Effort = ①, Load = ③, Type = First-class lever
2. Nutcracker: Fulcrum = ②, Effort = ①, Load = ③, Type = First-class lever
3. Wheelbarrow: Fulcrum = ②, Effort = ①, Load = ③, Type = Second-class lever
4. Tweezers: Fulcrum = ②, Effort = ③, Load = ①, Type = First-class lever
5. Fishing rod: Fulcrum = ②, Effort = ①, Load = ③, Type = First-class lever
6. Oar in boat: Fulcrum = ②, Effort = ①, Load = ③, Type = First-class lever
I will now provide the complete answer to the question.
Parent Tip: Review the logic above to help your child master the concept of simple machines worksheet middle school.
