Experiment 1

It's the start of "real" physics activities. We used a very high tech device than can produce an instant graph of velocity and distance over time from a detector of motion. It can produce the trend line of selected area of the graph. At first we detect the motion of a free falling ball and the motion of falling picket fence. A picket fence is a strip of glass with black stripes of equal spacing. As it passes through a detector, the detector detects how fast it is falling by detecting the motion of these stripes.

The first experiment, the free falling ball test is quite harder and sometimes give bad results. You have to throw the ball upward many times to get the result you want. Sometimes when your hand is exposed to the detector , you can get an unwanted result. The other one is quite easier because it gives a unique graph and is smoother compared to the one produced from the first one.

We did fifteen trials each test and all gives results of acceleration close to the value of g, the acceleration due to gravity. System error, and outside factors give small deviations from the real value.