Monday 4/25 –

We did planning for our project. We only had a vague idea of what we wanted to do. We knew it would be using a projectile to shoot through multiple media to find the acceleration of the projectile through it. Our ideas for our media included rubber bands, raw eggs and apple slices.

Tuesday 4/26 –

We decided on using apple slices. We started some basic setup procedures. We found the computer we would use and started making some simple set ups with ring stands and flash units. We did no experimenting, we just got a basic look at what we wanted our project to look like.

Thursday 4/28 –

We started becoming accustomed to the software that was to be used on the computer. We went to our working lab where we would do all the actual experimenting. We spent a lot of time moving things from upstairs to the downstairs lab. We worked on getting the sound trigger to work with the flashes and the flashes to work with the Intervalometer program.

Here is the

Tuesday 5/3 –

We started logging what we had done thus far in the project in our lab notebooks. We also worked more with our sound trigger, flash units and computer. We worked with them until we were able to set a delay on the computer so the flash went off a specified amount of time after the noise was made.

This is the sound trigger made from a microphone and wired with a breadboard.  It is battery powered. 

An overview of the computer, intervaolmeter, annunciator box, the interface box and the gun.  Here is where everything was set up to program the flashes going off at the correct times.

This is the stage where the slices were placed to be shot.

Thursday 5/5 –

We worked on our flash timing trying to figure out a timing where we could see the BB we shot out of the gun in the air. We made a high and a low end of time so we knew a range of time in which we could expect the BB to be seen. We then worked on closing the gap in the range, but we never saw the BB.

Friday 5/6 –

We found a timing for the flashes where we could see the BB in mid air. We then started taking photos and worked on getting two, three and finally four images of the BB to be seen in a single picture.

Tuesday 5/10 –

We recorded the exact timing for our delay and the intervals between flashes. We put our slices in the path of the BB and got some good pictures of the apple being shot, although we could not get a picture with four images of the BB in it.

Thursday 5/12 –

We got several pictures of the apple with four total images of the BB, two before the apple and two after the apple. This provided us with the pictures we needed to make the calculations to find the acceleration of the BB after passing through the apple slice.