On Tuesday our class did a egg drop. An egg drop is when you have a glass that is fulled with water, a plastic plate, an empty toilet roll and one egg.
The experiment worked because the gravity pushed the egg down into the water. The force of the gravity pushed the egg down because eggs are something that you can physically touch. The egg went into the cup because the plate and toilet roll was removed fast enough to leave the egg behind and not take it with the toilet roll and plate.