Wot, no cheese???

Hah!! I've done it!!!

I have produced a physics lesson on the subject on Momentum!!

Not too sure as to why hubs has gone wandering off in to the garden, shoulders hunched and shaking, mind you...

Right! Firstly you need 2 gerbils....

The first gerbil you attach iddy biddy roller skates too, and a crash helmet, obviously...... stand it on the floor, and whhhhhhhaaaack it on it's butt with a cushion! The gerbil free skates down the floor, time the gerbil's speed..

Second gerbil.... attach iddy biddy roller skates, crash helemt, and.. now this is very important... a prosthetic bottom....
Line the gerbil up, whaaaaaaaaaaaaaaaack with a cushion and.. the prosthetic bottom, crumples, thus reducing the force on the gerbil so it's speed is greatly reduced

Of course, all gerbils taking part in this experiment are members of the Elite Gerbil Stunt Division and have agreed to take part in aforementioned experiment.....

Pah! And they say physcis is hard....