Happy and Sad balls: Qualitative Testing Experiment
Aim
To use your model of momentum conservation to explain the outcome of the following experiment.
Prior Knowledge
How to choose a system for analysis of a process.
What is momentum of an object and momentum of a system?
What is impulse?
Description of the Experiment
Watch the first video and observe the differences between the two balls ("happy" and "sad"). Then watch the second video and explain what happens to the plank due to the collision with the "sad" ball. Then use your model of momentum conservation during elastic and inelastic collisions to reason whether the "happy" ball in the third experiment is going to change the momentum of the plank more or less than the "sad" ball. Be sure to choose your system before you start the analysis, as depending on the choice of the system, the analysis will change. Use your reasoning to predict what might happen to the plank as the result of the collision with the "happy" ball. Write down your prediction. Then watch the last experiment and decide whether your reasoning was supported.
Youtube movies can be stepped frame by frame using the , and . keys on your keyboard.
If you want to download the movie to your computer, right-click or control-click
HERE.
Youtube movies can be stepped frame by frame using the , and . keys on your keyboard.
If you want to download the movie to your computer, right-click or control-click
HERE.
Youtube movies can be stepped frame by frame using the , and . keys on your keyboard.
If you want to download the movie to your computer, right-click or control-click
HERE.
Questions
Choose the ball and the plank as a system for analysis.
Choose the ball as a system for analysis.
Are your predictions the same or different based on the system you chose? Explain.
