Science Changing A Surface Affects The Essay Example

on the base of the tub, leading to more friction and faster deceleration.

This occurs due to the presence of numerous bumps in contact with the base of the tub. These bumps collide and sometimes interlock causing the tub to come to a halt faster. A smooth surface without sticking bumps/fibres would cause the tub to slow down less. The experiment requires a stool as a base, an elastic band for propulsion, a tape measure to gauge distance, a margarine tub as the object to propel over various surfaces (including Soft Carpet, Rough Carpet, Lino, Perspex, Polished Wood, Sandpaper and wood), and a Newton Meter to maintain consistent tension of 10N. The stopping distance will be measured in centimeters from the front edge of the stool to the back of the tub for fair testing.

Instructions:
- Set up the equipment as shown below
- Choose a surface and note which one you have chosen
- Lay down the surface and prepare the tub for launch
- Place the tub in the centre of the elastic band and pull it back until it reaches the pre-set line for launching
- Release the tub when ready and allow it to come to a complete stop after traveling some distance along the surface
- Obtain a measuring device such as a metre stick or tape measure and measure the distance from the front of the stool to the back of the tub
- Record this distance next to the surface and repeat the same test 1 or 2 more times
- Once you have 2 results for that test, change the surface and repeat the process
We will take precautions to ensure that nobody is in the firing

line of the tub in order to avoid hitting anyone. The experiment poses little danger.

We will conduct the experiment on the floor instead of on a desk to minimize the risk of it striking someone. Additionally, we will ensure that the elastic band isn't overly extended to prevent any unintentional snapping and subsequent contact with individuals.