1.1

1.1 Observe and find a pattern In these three experiments, we will study the ability for a group of objects to smash a piece of chalk.


 * 1) Consider a 1-kg block with a flat bottom and a string attached to the top, the Earth, and a piece of chalk. You pull up on the string so that the 1-kg block slowly rises 0.5 m above the piece of chalk. After this lifting process, you release the block. It falls and breaks the chalk.


 * 1) Consider a 1-kg dynamics cart that can roll on a low-friction horizontal dynamics track and a piece of chalk that is taped to the fixed, vertical end of the track. You push the cart so that it rolls faster and faster toward the chalk at the end of the dynamics track and the cart breaks the chalk when it hits it.


 * 1) Now consider a slingshot that holds a piece of chalk. You slowly pull back on the sling. When you release the sling, the chalk shoots out at a high speed and hits the wall, causing the chalk to break.