Name: Happy and Sad Balls 2
Category: Mechanics
Subcategory: Linear Momentum and Collisions
Classes:
Comments: Set up the happy and sad balls as pendulum bobs on strings of equal length. Using the same amplitude, swing both balls into the tops of two identical wooden blocks. When set up carefully, the happy ball will knock over the first block, while the sad ball will not affect the second block. Explain in terms of conservation of momentum.