Simple Machines: Pulley Lab!
In this lab, the main questions we had to answer were these:
“How can force be manipulated using a simple machine?"
"What pattern do you observe regarding the relationship between force and distance
in a simple machine? "
To answer these questions, we followed these steps:
- We designed a pulley system!
- After many attempts, the pulley system was finally able to hold the 200g brass mass, which meant the next step was to put the 100g brass mass on the other side and start lifting!
- After lifting the 200g brass mass to 10 cm, we measured the length of string it took to lift it up.
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After lifting the 200g brass mass with 1.8n, we were challenged to use the same pulley but find a way to pull the mass with only .5n! To accomplish this, we lifted the mass in many different ways, but we were finally able to accomplish this by pulling diagonally to the right. Although it took roughly 3cm more string, the task was accomplished. From our lab, we were able to come up with the equation: W=FD. Work(energy) equals force(newtons) times distance(centimeters)
Real World Connection:
Speaking of simple machines, every time I ride my longboard, I'm using a simple machine commonly known as the wheel and axle! The wheel and axle have made it super easy for people to move things and it has been the basis for tons of creations!
Thanks again for including the big question and for connecting what we learned in class to a great real-world example (the wheel and axle of a longboard). Make sure to include the equations derived (W=Fd) and the meaning of the graph (Work is the area of a F v D bar graph, which remains constant).
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