## Ball Toss

Draw below the position/time graph for a ball that is moving freely up and down in the air:

Draw below the velocity/time graph for a ball that is moving freely up and down in the air:

Draw below the acceleration/time graph for a ball that is moving freely up and down in the air:

With the motion detectors in Port 2 and ULI turned on, start "LoggerPro" and open Experiment 6 in the "Physics with Computers" folder.

Practice throwing the beach ball up and down over the motion detector. When you have motion graphs (x/t, v/t, a/t) that you feel are reasonable, sketch them on top of the motion graphs you drew above.

What difference is there in the a/t graph between the experiment and the prediction? Explain.

## Forces

Two equal mass cars are pushed with equal speeds toward each other. Draw the force against time graph you would expect for each car.

One car is at rest. An equal mass car is pushed toward it. Draw the force against time graph you would expect for each car.

A heavy and a light mass car are pushed with equal speeds toward each other. Draw the force against time graph you would expect for each car.

A light mass car is at rest. A heavy mass car is pushed toward it. Draw the force against time graph you would expect for each car.

A heavy mass car is at rest. A light mass car is pushed toward it. Draw the force against time graph you would expect for each car.

Now observe what happens and draw on your graphs above what the forces really look like.

What conclusion can you make about interactions between different objects?