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FM EI: 1b (10/27)

Last updated over 2 years ago
5 questions

Objective: SWBAT analyze a series of variables and predict the effectiveness of supply pods for disaster victims.

Do Now:


0

What materials do you have at home that you are thinking would be best for your egg drop?

Guided Notes: Energy

1. Minimize cargo damage;
a. The supply pods must be designed so that they protect the supplies inside when the pod collides with the ground. Damaged supplies will not help the people who need them.

2. Maximize shell condition;
a. The shell of the pod should be reusable after the drop. If the supply pod has almost no damage, the whole outer shell may be used as a temporary shelter for up to three people, protecting them from the sun and rain. If the supply pod is slightly damaged, pieces of the shell can be reused as building materials. If the pod is severely damaged, the shell cannot be reused.

3. Keep costs low.
a. The cost of the pod must be low so that International Disaster Aid can help as many people as possible. The lower the cost of each pod, the more pods International Disaster Aid can build and deliver.

Practice:

0

Record the results of your LOWEST DAMAGE test.

Supply Drop: CLICK HERE

0

Record the results of your LOWEST COST/DAMAGE test. (how cheap can you create a pod under 5.0% damage?)

Supply Drop: CLICK HERE

0

Why do you think the earth is barely affected by the impact?
CFS:
  • accurately identifies the changes to each object in a collision
  • accurately describes the relationship between force, mass and velocity in a collision

Exit Ticket:

Changing the Time of Collision

When a supply pod hits the ground, the collision seems to happen in no time at all. However, if we could use a special slow-motion camera, we could see that some collisions last longer than others. The longer the collision takes, the smaller the impact force on the object. It might seem strange to think that a longer collision would do less damage to the object, but that’s exactly what happens. This is why there are pads wrapped around the goal posts at football and rugby games—if a player collides with the post, the pads compress, or squish down, during the collision. Due to the padding, the time of collision is slightly longer, and the force is spread out over a longer period of time, making the player’s collision with the pole hurt less!
2

How is a longer collision time related to impact (force) on the object?
(think f=ma, how is slowing a collision related to a reduction in force)

CFS:
  • accurately identifies the changes to each object in a collision
  • accurately describes the relationship between force, mass and velocity in a collision