- 1 Air pump
- Books and papers (20 notebooks,5 geography and 4 geography textbook, 3 lecture pads.)
- Weighing Scale (2100g-0.01g)
- Drill stand
- Thick industrial gloves
- 2 Wooden Planks(9.5" x 4.5")
- Nails (About 120)
- Balloons (About 50)
- 4 Wooden Rods ½ inch in diameter 6cm tall
- Stacks of paper. (All the paper from 2 Lecture pads. 423g)
- 2 pieces of cardboard 30cm by 30cm
Making sure the nails are placed evenly and have the most expose surface area.
Draw and plan it out on a piece of paper first. Using dots to represent nails, draw the dots such that they can form a triangular pattern to achieve maximum surface area. Make sure they are all 1 cm apart.
Preparing the set-up
Before we continue, we put on a part of gloves to prevent splinters and pricking ourselves from the nails. Now photocopy the piece of paper you used to planed out the position of the nails, and stick it onto a piece of wood, 9.5inch by 4.5 inch , and start drilling in the holes for the nails. In one board drill in the holes only for the nails. In the other board drill in the holes only for the dowels.
- Insert the wooden rods and place the second board over the top.
- Next get 2 pieces of cardboard. In one piece of the cardboard, cut a circle with a diameter of 20cm. And cut a circle with a diameter or 30cm
- Pump air into the balloon such then when placed vertically, it it would pass through the 20cm cardboard just nicely without any gap. Also pump until when place horizontally through the 30cm cardboard, it passes just nicely without any gaps.
- Place balloon in between the nails and the board. Place it horizontally.
- Place stacks of paper and books on the board above the balloon, until the balloon pops.When the balloon pops,measure the weight of the books and paper, that will be its maximum weight.
- After each time the balloon pops, add 5 more nails and repeat step 9.
- Record down all the maximum weight per number of nails and plot a graph
jj Risk Assessment and ManagementRisk and Safety:
Injuries by nails. When handling the sharp nails, some of them could be rusty or be un sanitized. When pricked, we could develop an infection called tetanus infection, as infections occurs through wound contamination from a cut or puncture wound. Tetanus infection can be life threatening when not treated early. You can get muscle spasms developed in the jaw and other parts of the body. By the time you get these symptoms it might be too late already.
Safety Measurement 1:
We can buy nails from a trusted hardware shop which doesn’t just remove rust from nails picked up from construction sites. Or wear thick industrial gloves which will prevent us from getting pricked easily by the nails.
Getting injured by the drill. The drill has a sharp pointed metal tip, when in contact with bare skin, it can easily tear through it. So if we get in contact with the pointed tip, we could bleed profusely, leading to blood loss. When drilling, if the metal tip is not fasten properly, it could get loose and cut you. Or in the worst case scenario get lodge into some part of your body.
Safety Measurement 2:
When using the drill we will use a drill clamp to ensure the drill is properly secured and also ensure the drill bit is tightened to prevent it from flying off.
When drilling into woods, there are wood fillings, and if there is a strong gust of wind, the wood fillings can fly and entre our eyes. Distracting us and making it very dangerous to be using a drill as we will be trying to get it out but also have to focus on the drill.
Safety Measurement 3:Ensure that we are wearing safety glasses and use a drill clamp if not confident in using the drill.