Marvin and Milo

Explore physics the exciting way, by trying out a simple and fun experiment. This month, Resting Egg Don't forget to check back next month for the next edition...

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What you need


A broom

A glass

An egg

A paper plate

An empty toilet paper roll



Fill the glass half-way with water and set it near the edge of a counter or table.

Place the paper plate on top of the glass, with the edge of the plate slightly over the table edge. Stand the toilet paper roll in the middle of the plate, making sure that it's over the centre of the glass. Place the egg on the toilet roll.

Stand with the broom next to the table edge, with the handle in front of the plate. Place one foot on the bristles, bend back slightly, then let go!

Results & explanation


When the broom hits the plate, the plate and toilet roll are knocked away and the egg falls into the glass, because it is not moving sideways as the plate and toilet roll move away. Objects do not start to move in a given direction unless acted on by an external force in that direction.


Read more about inertia and gravity on


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