Interactive Science exhibits, ideated and fabricated to inclucate and invigorate the young minds about Science !!
conservation of momentum
Here, a number of steel balls are suspended serially with the help of a hinge at the top. Hold a ball in hand and allow it to strike another ball. Try the same thing by holding 2 steel balls together and allowing to strike the remaining idle balls. Repeat with 3 steel balls and then with 4 steel balls.
What did you observe?
Even though the number of balls striking change, the remaining balls do not move.
The science behind it :
The remaining balls do not move due to their resistance to the movement caused by the inertia.