final+lab+report

Research Question: How does different surfaces affect the magnitude of the force?

Hypothesis: If the surface is rougher, then the magnitude of the force would be greater, because friction, the opposing force, causes us to require more effort to move the object.

Variables : amount of friction, force, surface, weight, speed, shape, spring scale Independent Variable : surface Dependent Variable : force Controlled Variables : speed, shape, spring scale, weight
 * Part 1**

Independent Variable : weight Dependent Variable : force Controlled Variables : surface, speed, shape, spring scale
 * Part 2**

Part I 1. Draw a Data Table to record the different types of surfaces to be tested and the force needed to pull the block at a constant speed. Note that this data table should be included under the //__Data and Calculation section__//.
 * Procedure:**

2. Place 1000_ grams in the box with the surface to be tested.

3. Attach your newtonmeter to the block.

4. Using the newtonmeter, try and pull the block along the surface. __Note the force needed to pull the block at a constant speed and record in your Data Table.__

5. Repeat steps 2-4 for the other different surfaces.

Part II 1. Draw a second Data Table to record the different weights to be tested and the force needed to pull the block at a constant speed. Note that this data table should be included under the //__Data and Calculation section__//.

2. Place 200, 500, and 1000 __grams on the block with the surface to be tested.__

3. Attach your newtonmeter to the block.

4. Using the newtonmeter, try and pull the block along the surface. Note the force needed to pull the block at a constant speed and record in your second Data Table.

5. Repeat steps 2-4, placing different weights on the block.

6. Draw an x-y graph showing how the weight placed on the block affects the pulling force in newtons. Note that this graph should be included in the //Results and Analysis section__//.


 * || **Trial 1** || **Trial 2** || **Trial 3** || **Average** ||
 * **Cork** || **7.9N** || **8.1N** || **8.2N** || **8.1N** ||
 * **Plastic** || **1.6N** || **1.5N** || **1.7N** || **1.6N** ||
 * **Carpet** || **3N** || **3.1N** || **2.9N** || **3N** ||


 * || **Trial 1** || **Trial 2** || **Trial 3** || **Average** ||
 * **200g** || **1N** || **1.1N** || **0.9N** || **1N** ||
 * **500g** || **1.8N** || **1.6N** || **1.5N** || **1.6N** ||
 * **1000g** || **3N** || **3.1N** || **2.9N** || **3N** ||

My hypothesis was correct. Different surfaces and weights actually do affect the force of the object. If the surface of the object and the surface where the object moves on is rough, more friction is produced and therefore, the force needed for the object to move is increased. This was tested by pulling objects with the same weight but different surfaces over a table, and the force required was measured with a newtonmeter. If the weight of the object is larger, the force required would increase as well, as the larger amount of weight would cause more friction, causing the amount of force required to increase.
 * Conclusion:**

Improvement: We could have increased the amount of different surfaces and weight. This would ensure that the results would be more detailed and accurate. We could have used a device or equipment to pull the newtonmeter to have the object be pulled at the same speed. When we did it, we may have pulled it faster at some point, and pulled it slower at others, and this affects our results.