KinexiaLEARN PHYSICS

Egg Drop Engineering Challenge

Engineers protect astronauts, parcels, and passengers with the same trick you will use to save an egg: stretch out the collision. Build it, drop it, and read the cracks (or the lack of them).

Safety:

Drop onto a tarp, old sheet, or outdoors for easy cleanup. Do this outside or over a washable surface — raw egg is slippery.

Materials

  • Raw eggs (several)
  • Drinking straws
  • Tape (masking or packing)
  • Newspaper or paper towels
  • Paper cups
  • Plastic bags or bubble wrap
  • Scissors
  • A drop height (balcony, stairs, or ladder with adult help)

Procedure

1

Set the rules

Agree on constraints before building: for example, the container must fit in a shoebox, or you may use only 10 straws and 1 meter of tape. Real engineers always design inside limits.

2

Build the protector

Design around one idea: slow the egg's stop. Crumple zones (newspaper), cages (straws), and parachutes (plastic bag) all work by extending the stopping time or distance.

3

Drop from low height

Drop from 1 meter first. Open the container and check the egg. Note exactly what deformed, tore, or held.

4

Iterate and go higher

Fix the weak point you found and drop from 2 meters, then 3. Record which design changes helped and which did nothing.

5

Measure and compare

Weigh each container. The best design is the lightest one that survives the highest drop — protection per gram is the engineer's score.

What to observe

  • Designs that crush or crumple on impact protect better than rigid shells.

  • A parachute slows the fall but the landing still needs cushioning.

  • Small design tweaks (padding the egg's sides, not just top and bottom) make big differences.

Why it happens

Surviving a fall is about impulse: FΔt=ΔpF\Delta t = \Delta p. The egg's momentum change Δp\Delta p is fixed by the drop height, so the only way to shrink the peak force FF is to stretch the collision time Δt\Delta t. Crumpling newspaper, bending straws, and squashing cups all convert the egg's kinetic energy into deformation work over centimeters instead of millimeters — the same physics as a car's crumple zone protecting its passengers.

Try variations

  • Ban parachutes and see who still survives 3 meters on cushioning alone.

  • Drop two identical eggs, one in a rigid box and one in a crumpled-paper nest, and compare.

  • Film the landing in slow motion and estimate the stopping distance of each design.