https://padlet.com/j_perko/sdkq4mlxvv86 Friction Board en-us 2018-02-27 17:31:27 UTC 2026-01-04 11:11:01 UTC hello@padlet.com j_perko https://padlet.com/j_perko/sdkq4mlxvv86/wish/236580996 How will reducing the size of the block affect the amount of force needed to pull the block?]]> 2018-02-28 18:28:41 UTC https://padlet.com/j_perko/sdkq4mlxvv86/wish/236580996 j_perko https://padlet.com/j_perko/sdkq4mlxvv86/wish/236583394 Friction makes many things easy, but can also make things very difficult. Friction is what allows me to grip a pencil. Friction is also in our joints, as our bones are protected from rubbing against each other. Force is what is being measured in this experiment. Specifically, the amount of force needed to pull the block across the surface is what is being measured. Friction is what will affect the test, as it is the force that works against two objects sliding against each other. Our shoes on our feet are affected by friction, depending on the materials of both the bottom of our shoes, and the ground. Kinetic friction is the force that slows down the moving object, and static friction is the force one must overcome to get the object moving in the first place. The mass of the object will affect the static friction needed to get the object moving. Also, the surface of the object will affect both static and kinetic friction. Simply, static friction is the force one must overcome to get the object to move, and kinetic friction is the force working against it after it has started moving.]]> 2018-02-28 18:32:16 UTC https://padlet.com/j_perko/sdkq4mlxvv86/wish/236583394 j_perko https://padlet.com/j_perko/sdkq4mlxvv86/wish/236592391 If I reduce the mass of the block I test with, then I will need to use less force to move it, because the block will have less mass, so static friction will be weaker.]]> 2018-02-28 18:43:51 UTC https://padlet.com/j_perko/sdkq4mlxvv86/wish/236592391 j_perko https://padlet.com/j_perko/sdkq4mlxvv86/wish/236595486 1 Large wooden block with a hook attached
1 Small wooden block with a hook attached 
1 Friction board with a rubber surface
1 Triple Beam Balance 
1 Force Meter
1 Ruler ]]> 2018-02-28 18:48:24 UTC https://padlet.com/j_perko/sdkq4mlxvv86/wish/236595486 j_perko https://padlet.com/j_perko/sdkq4mlxvv86/wish/236599029 1. Measure the mass of the large block using the triple beam balance, and record it, using grams as the unit of measurement.  
2. Measure the length, width, and height of the large block using centimeters. Record the data.
3. Latch the hooked end of the force meter to the block, and place it on the rubber surface of the friction board. This is the control.
4. Gently pull the block from the surface of the friction board, while also watching for the highest reading on the force meter. Record the highest amount of force in grams when done with this step.
5. Repeat step 4 twice more, for a total of 3 times, remembering to pull gently, and to record the highest reading in grams.
6. To get the average of the 3 trials, add the numbers from all three trials, and divide that number by 3. Record this number.
7. Measure the mass of the small block using a triple beam balance. Record the mass in grams.
8. Measure the length, width, and height of the small block, and record the data in centimeters.
9. Latch the hooked end of the force meter to the small block. Then, place the block on to the rubber surface, just like in step 3. This is the variable.
10. Gently pull the small block form the rubber surface, just like in step 4. Record the highest number in grams.
11. Clean up your lab station, and return the materials.]]> 2018-02-28 18:53:12 UTC https://padlet.com/j_perko/sdkq4mlxvv86/wish/236599029 j_perko https://padlet.com/j_perko/sdkq4mlxvv86/wish/237067966 Control: Large Block
Pulling the large block stayed the same as far as difficulty of pulling it. This means the force stayed within the 700's. The wooden block against the rubber surface made it difficult to pull, more difficult than it would be just pulling it on the ground. The rubber surface created friction between the block and the rubber surface. If I tested the block on a cardboard surface, the friction would be much less. The block did not just glide gently across the  rubber. There was conflict while pulling. 
Variable: Small Block
Testing the large block and the small block were very different. Even on the rubber surface, which would create much more friction than any other on a friction board, was hard to get a reading on for the small block. When I pulled it, I barely even felt it. Testing was so easy, it became difficult. Pulling the block across the board was easy, but then keeping a reading was difficult. 
Below: Control Diagram]]> 2018-03-01 17:49:38 UTC https://padlet.com/j_perko/sdkq4mlxvv86/wish/237067966 j_perko https://padlet.com/j_perko/sdkq4mlxvv86/wish/237219492 Graph will take a while to load]]> 2018-03-01 22:43:35 UTC https://padlet.com/j_perko/sdkq4mlxvv86/wish/237219492 j_perko https://padlet.com/j_perko/sdkq4mlxvv86/wish/237222667 1. When I set up my tests, I set up the friction board against a flat table surface. After that, I then screwed in a hook in to the large block. I put the block on the rubber surface, and pulled it. I did this for a total of 3 times, and then I did the exact same thing with the small block.
3. As far as results, the maximum result of the control, the large block, was 775 grams of force, and the minimum result of the control was 700 grams of force. The maximum result for the variable, the small block, was 100 grams of force, and the minimum result was 25 grams. These numbers tell me that the large block took much more force to pull than the small block.
3. My hypothesis was correct. My hypothesis said that if I reduced the mass of the block I pull, I will use less force to pull it because static friction would be weaker.
4. Some faults that could have occurred when testing are, pulling faster or harder in different tests, which can skewer the results, and the board slipping while pulling the block. The first fault occurred more with the small block, and the latter with the large block. 
5. I have learned that friction is affected by mass and the two objects' textures. I have also learned that friction actually affects many things in the real world. Airplanes are affected by friction in the sky. 
6. Friction is a part of this experiment that affects the real world. Friction is at work when our shoes touch the ground, when an airplane experiences turbulence, when we walk. Friction affects objects in motion more than we expect.
7. One testable question that can be tested with my findings is, how long would it take for a car to stop on a dry road (control) and on a wet road (variable)?
Below: Variable Diagram]]> 2018-03-01 23:00:34 UTC https://padlet.com/j_perko/sdkq4mlxvv86/wish/237222667