Rubber Band Lab

Big Question:  

How can we store energy to do work for us later?

How does the force it takes to stretch a rubber band depend on the amount by which is stretched?

The Purpose of this lab is to find the answers to the big questions. We wanted to find out how we could store energy to do work for us later find out how much force it takes to stretch the rubber band depending on how much it is stretched.

To find this out, we derived the equations F=kx and Us=1/2kx^2. F=kx is to find how much force it takes to stretch the rubber band. Us=1/2kx^2 is to find the amount of energy stored!

We used an electrical force probe attached to a rubber band. The rubber band was on the air track. We pulled 1cm, 2cm, 3cm, 4cm and then 5cm. Then we repeated with 2 rubber bands!

After collecting the data (Left Side) we graphed it. The y axis is the Force in Newtons it took to stretch the rubber band and the x axis is length the rubber band is stretched converted to meters!

I learned that potential energy is the energy that we store for later

Real World Connection: This connected to a bow and arrow!

When Baby Cupid pulls back that arrow, the bow is storing energy. Then he lets it go, and it goes make somebody fall in love. Same concept! More energy, the further the arrow goes.

Pyramid Lab!

Simple Machines make our lives easier!

 This week in Physics, we got the opportunity to do the Pyramid Lab. It was really hands on. We were constantly collecting data. We wanted to discover how distance and force were related and if they were universally conserved. We put a toy car on the ramp and a force probe to determine how much force it took to pull the car up the ramp.


Equation Used:
W=FD- Work equal Force Multiplied by Distance


What did you learn?
I that that forced and distance were related to each other inversely. They are universally conserved. I learned that when distance increases, the force decreases and when force increase, the distance decreases!

How is this connected to the world?

This is connected to skateboarding. When Tony Hawk is skating down the ramp, the longer/steeper it is, the less force it requires and the less he has to work. But if he's just skating down the street he has work harder.

Force vs. Mass

We got the chance to do a lab in class where we measure Mass vs. Force. The big question was, What is the relationship between mass(kg) of an object and the forced(N) needed to hold it in place? To answer the big Q, we used electrical and manual probes and brass masses. After we measured the brass masses, we used the slope formula, y=mx+b, and plug and chugged our data into the formula:
y=10x+0
Force in Newtons=10m+0.. (the y-intercept is 0 because the lines go through the origins)
The equation y=10x+0 is a simpler version of the equation F=mg. F=mg is the specific version and plug/substitute them.

WHAT DID YOU LEARN?
It was really fun because I learned that is the mass increases in an object, the forced needed to lift it does the same. The amount of force needed to lift an object is 10 newtons to every kilogram.

REAL WORLD CONNECTION
This is connected to my life because when I go to the weight room to lift weights I know (already knew) that when I try to challenge myself to see if I am really a beast and add more weight I have to use more force!!!

FORCE NEEDED!!!

Pulley Lab!

Last week in Physics, we were able to measure how much force(newtons) it takes lift a brass mass. To measure that, we got the opportunity to build a pulley! We used the pulley to lift a 200g brass mass, 10cm off the table.


In the Lab I learned that when using a pulley, they use less force and get more distance. When they don't use a pulley, they gave to used more force and get less distance. This Brings us into our real world connection. People use technology/machinery so they don't have to work as hard and in this case we get more out of it...

REAL WORLD CONNECTION:
The Force vs. Distance Lab is connected our everyday lives in a very big was because elevators are very important with our transportation through tall buildings. Millions of America's population go up and down elevators daily wether it's at work, a hotel, or many other places


How an elevator works; Pulley System