Identify the Criteria and Constraints Name Identify the criteria, constraints and possible impact on humans and the environment. 1. You oversee building a footbridge that crosses a small stream. The footbridge must be able to hold the weight of ten people and be 2 meters across and 15 meters in length. The materials for construction must include recycled materials. Criteria: Constraints: Impacts: 2. You design a container that keeps a raw egg from cracking when it is dropped 20 feet. You can only use 5 materials in your construction, and you must complete your design and construction in 20 minutes. Criteria: Constraints: Impacts: 3. The city has decided to add a dog park to the city lot. It will need fencing, grass, a bench, a bag dispenser, a waste receptacle, and a sign with the rules for dogs and owners. The total cost needs to be under $25,000 dollars. Criteria: Constraints: Impacts:

Answer 1

1. Footbridge

Criteria:

• Must support the weight of at least ten people simultaneously.
• Dimensions: 2 meters across and 15 meters in length.
• Must utilize recycled materials for construction.
• Should be safe and sturdy for pedestrian use.

Constraints:

• Limited budget for materials.
• Local building codes and regulations must be followed.
• Environmental impact must be minimized (e.g., construction disturbance near the stream).
• Time frame for construction.

Impacts:

• Potential changes to the stream ecosystem (e.g., habitat disruption).
• Increased human access to natural areas, encouraging outdoor activities.
• Encouragement of sustainable practices through the use of recycled materials.
• If improperly designed, risk of injury to users.

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2. Egg Container

Criteria:

• Must prevent a raw egg from cracking when dropped from a height of 20 feet.
• Can only use a maximum of 5 different materials.
• Design and construction must be completed within 20 minutes.
• The container should be lightweight for easy carrying.

Constraints:

• Limited time for design and assembly (20 minutes).
• Limited number of materials (5).
• Materials must be accessible and feasible to use within the time frame.

Impacts:

• Development of critical thinking and problem-solving skills for individuals engaged in the task.
• Encouragement of innovation in using limited resources effectively.
• If successful, it may inspire educational projects related to engineering and physics.
• Waste generation if materials are not reused or recycled after the project ends.

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3. Dog Park

Criteria:

• Must include fencing, grass, a bench, a waste dispenser, a receptacle for waste, and a rules sign.
• Total cost of the project must remain under $25,000.
• Environmentally friendly landscaping methods should be considered.
• The park should be designed for safety and accessibility.

Constraints:

• Maximum budget of $25,000, which limits material choices and design features.
• Space limitations of the city lot must be adhered to.
• Must comply with local regulations and zoning requirements.

Impacts:

• Provides a designated space for pet owners, improving community engagement.
• Potential positive impact on mental health and well-being for dog owners.
• Environmental impacts due to ground cover (e.g., turf vs. natural grass) and proper waste disposal.
• May lead to increased foot traffic, which could affect local wildlife and encourage responsible pet ownership.

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These identified criteria, constraints, and possible impacts help in the project planning and decision-making process, ensuring that all factors are considered for successful completion.