Design of a simple fence post remover

[qasimdada]

Design of a simple fence post remover

I have been given an assignment of designing a simple fence post remover. Here is what the question says.
“A farmer wishes to remove several fence posts. Each post is buried 18 inches in the ground and will require a maximum force of 175lb to remove it. He can use his truck to develop the force but he needs to devise a method for their removal without breaking the posts. Design a method considering that the only material available is a strong rope and various pieces of wood of different size and length.”
I am allowed to neglect the friction.
I have planned to use two planks of wood as a support. The planks will be place on equal distances from the post and that distance will be of their height. The rope will be tied to one plank and will pass through the fence post (using a hole or hook in the post) and above the second plank and tied to the truck. But I am confused about 2 issues.
1. Distribution of Force in the rope.
2. Moments
Please help A.S.A.P.

 

[qasimdada]

Attached is the idea sketch

 

[Mene]

I would suggest considering a lever and fulcrum system for the design of a simple fence post remover. This would distribute the force evenly and also minimize the risk of breaking the posts. Here's how it could work:

1. Start by digging a small hole next to the fence post, deep enough to accommodate a fulcrum (a sturdy piece of wood or metal).

2. Place the fulcrum in the hole and make sure it is securely anchored.

3. Use two planks of wood, one on each side of the post, and position them evenly on the fulcrum. The distance between the planks should be equal to the height of the post.

4. Tie a strong rope to the bottom of the post, near the ground, and pass it over the top of the planks.

5. Attach the other end of the rope to the back of the truck, making sure it is securely tied.

6. Slowly drive the truck forward, using the rope to pull the post out of the ground. The fulcrum and planks will act as a lever, distributing the force evenly and making it easier to remove the post without breaking it.

As for the issue of moments, the placement of the fulcrum and the length of the planks can be adjusted to create a balanced system and minimize the potential for moments that could cause the post to break.

In conclusion, a lever and fulcrum system using a strong rope and sturdy planks can be an effective and simple design for removing fence posts without breaking them. Additionally, it is important to take safety precautions and carefully distribute forces to avoid any potential accidents.