Physics Assignment

In Physics class our teacher gave us an assignment to do. The topic is about finding the Physics behind any object. Since Physics attending everywhere my group decide to fine the Physics behind Football. 

Below are the examples of Physics behind football!

Goalkeeping

  1. First law
    1. The goalkeeping role the ball to the defender, if there no frictions acting on the ball will just keep moving.
    2. If the ball stay at rest it still at rest, unless a footballer kick it
  2. Second Law
    1. Soccer ball and bowling ball, bowling ball has more mass so it has less acceleration. Soccer ball accelerate faster cuz it has less mass
    2. Greater force of kicking to more acceleration
  3. Third Law
    1. When you kick the ball the ball pushes equal and opposite on our foot
    2. When we jump and hit the ground and it bounce back up, this is because when our mass hit the ground and the Earth exert the same amount of force as the amount of our body hitting the ground.

First Physics Lab

To experimentally determine the coefficient of static friction for multiple materials, and to solidify students’ understanding of friction.

Materials:

  • Planks of wood
  • Measuring tools (protractors, rulers)
  • different types of sandpaper
  • Cloth
  • Books (for raising planks of wood)
  • Paper clip boxes (for sliding down planks)

Instructions:

  1. Build a ramp using the plank of wood and a stack of books/objects.
  2. Place a box of paper clips upon the plank of wood and determine the minimum angle at which the box will slide.
    1. Place the box of paper clips onto the plank.
    2. If it immediately slips down the plank, reduce the angle of the ramp (lower the raised end of the plank) and try again.
    3. If it now doesn’t slip, increase the angle, and try again. Repeat adjustment process until you find the angle at which the box just starts to slip.
    4. Make your changes in height small enough that you can get an accurate idea of what this angle is.
  3. Do three trials of this process, and take the average of the three angles you measure.
  4. Repeat this procedure, placing the different types of sandpaper/tin foil on top of the plank surface. Rotate the sandpaper among the different lab groups.
  5. Record your findings in your notebook, in a table similar to the one below.
  6. Use the average minimum angle you find for each material to calculate the coefficient of static friction (hope you remember how to do this 🙂 !) Rewrite the math in your lab journal.
  7. When you are done, look at your results and put the materials in order from largest coefficient of friction to smallest. Compare with other groups!