You will need:
Now for the tricky part. You need to very quickly knock the tray/plate sideways, using a kind of “sideways karate chop” technique. The tray will fly horizontally, and the raised lip on the edge will catch the toilet roll, and the egg should fall straight down into the water, and stay un-cracked!
Variation: Try this experiment without the water in the glass!
Isaac Newton’s First Law of Motion says that an object that’s moving will continue to stay moving, and one that’s stationary will continue to stay still, unless a new force is applied to it.
This is the same principle that makes the classic magic trick, where a magician whips a tablecloth off a table leaving the crockery and cutlery still there, work.
Inertia (the tendency of moving objects to stay moving) it critical to understand when you’re thinking about road safety. Without seatbelts in our cars, our bodies would keep moving forwards if our car stops suddenly, for example in a crash. The seatbelt applies a force to our bodies that slow them down, stopping us going flying. The same goes for loose objects that are hanging around in the back seat of your car - an unrestrained object can move forwards in a car crash and can become a projectile
Up for a challenge? Try this experiment with a bigger tray, and two toilet rolls, eggs and glasses. Try three, maybe four!