Question 1:
Most of the device was pretty even in turns of energy usage but if there was one part that was exceptionally wasteful, it would have to be the gun shooting the tennis ball. Because the gun has a vast amount of energy and power but all it does is push a tennis ball ever so slightly to right.
Question 2:
The transfer that was most efficient was when the tennis ball crashed into the wood blocks and made domino-like effects. The reason I think it was the most efficient is because the tennis ball was relatively slow moving. Yet, it was still able to knock down many big and heavy wood blocks by making a domino effect
Question 3:
I've learned many things about this device, especially how difficult it must have been for the TED talk people to construct something of such magnitude. Every little step has to be perfect and tested many times. Every time you test it you must set it back to it's original state. It's a very tedious and time consuming process, but rewarding when everything works out.
Monday, October 28, 2013
Transfer of Energy Lab Post 2
The project is going well, although albeit a little slower than we imagined. We've abandoned the principle idea of making a cup of coffee. Instead, we have decided that this project will raise a flag of some kind and/or inflate a balloon. A challenging part of the project so far has been getting the switch on the fan cart to turn. We ended up succeeding by looping a piece of string over the knob really tight and then trying a weight to the end that would fall off the table and thus, pull the string and turn the knob.
Transfer of Energy lab post 1
Materials:
Marbles
String
Yarn
Electric car
Pendulum launcher gun
Wood blocks
Foam tubing
Baking Soda
Vinegar
Balloons
Most if not all the materials should be in the storage room. Except balloons, Keyur will bring balloons. Constructing a device that will flip the switch on one of the electric cars seems very challenging. And lining up the gun with the object it's meant to hit will be troubling as well since so many factors play into the trajectory of the ball. If it misses, that will be a big problem.
Marbles
String
Yarn
Electric car
Pendulum launcher gun
Wood blocks
Foam tubing
Baking Soda
Vinegar
Balloons
Most if not all the materials should be in the storage room. Except balloons, Keyur will bring balloons. Constructing a device that will flip the switch on one of the electric cars seems very challenging. And lining up the gun with the object it's meant to hit will be troubling as well since so many factors play into the trajectory of the ball. If it misses, that will be a big problem.
Wednesday, October 2, 2013
Soda bottle rocket Post 3
Questions
The maximum amount of force that can be created from 200ml of vinegar is roughly 500N. Careers that would involve this sort of experimentation would be military or civilian rocket programs. If military, than a weapons engineer perhaps and if civilian than an aerospace engineer. These engineers would have to use a test like this in order to find out how much force can be created from a given amount of fuel so they can calculate how much fuel they need to put on the rocket. More fuel than necessary, and the rocket will weigh to much. Too little fuel will result in failure to reach destination. Another use of this type of experimentation is a gun manufacturer. While most calibers are already laid out, those that invented them had to find out how much force a given amount of gunpowder would exert on the projectile and find the point where weight gained is not lowering the speed and accuracy even though there is slight force gain. In other words, they had to find out when they start getting diminishing returns in terms of weight to force of the bullet.
1. Newton's third law states that for every action there is an equal and opposite reaction. For example, a rocket launch. Force of rocket engine going down pushes rocket up
2. Recoil is a good example of Newton's Third law because the original action would be gunpowder ignition pushing the projectile out and the reaction is the force backwards or the recoil
3. You don't observe Ping-Pong paddle recoil because the paddle is a lot bigger and has a higher normal force than the Ping-Pong ball plus your holding it so the force travels throughout your body
4. Because F=ma, F1=12*2.5 And if F1=F2, 30=4*a, acceleration of the 4kg object is 7.5 m/s/s
The maximum amount of force that can be created from 200ml of vinegar is roughly 500N. Careers that would involve this sort of experimentation would be military or civilian rocket programs. If military, than a weapons engineer perhaps and if civilian than an aerospace engineer. These engineers would have to use a test like this in order to find out how much force can be created from a given amount of fuel so they can calculate how much fuel they need to put on the rocket. More fuel than necessary, and the rocket will weigh to much. Too little fuel will result in failure to reach destination. Another use of this type of experimentation is a gun manufacturer. While most calibers are already laid out, those that invented them had to find out how much force a given amount of gunpowder would exert on the projectile and find the point where weight gained is not lowering the speed and accuracy even though there is slight force gain. In other words, they had to find out when they start getting diminishing returns in terms of weight to force of the bullet.
1. Newton's third law states that for every action there is an equal and opposite reaction. For example, a rocket launch. Force of rocket engine going down pushes rocket up
2. Recoil is a good example of Newton's Third law because the original action would be gunpowder ignition pushing the projectile out and the reaction is the force backwards or the recoil
3. You don't observe Ping-Pong paddle recoil because the paddle is a lot bigger and has a higher normal force than the Ping-Pong ball plus your holding it so the force travels throughout your body
4. Because F=ma, F1=12*2.5 And if F1=F2, 30=4*a, acceleration of the 4kg object is 7.5 m/s/s
Soda Bottle Rocket Post 2
Observations
Even though the cap exploded away from the rocket, the bottle moved in the opposite direction as well although not nearly as much. This is due to Newton's third law which states that for every action, there is an equal and opposite reaction. In this case, the force of the expanding gas in the bottle caused the projectile to launch and the bottle to move back equally. The projectile went further because it had less mass to it compared to the bottle.
Error Analysis
The bottle rocket fell of the rollers several times thus incorporating friction into our data which was unintentional. The rollers were intended to get rid of the friction variable but the force was just too much for the straws to stay in position. Another possibility for error was how deep the stopper went into the neck of the bottle after each trial. And finally, since we had to make our own troughs, we had to adjust the experiment to however much sodium hydrogen carbonate can fit inside our trough, thus giving us different measurement
Even though the cap exploded away from the rocket, the bottle moved in the opposite direction as well although not nearly as much. This is due to Newton's third law which states that for every action, there is an equal and opposite reaction. In this case, the force of the expanding gas in the bottle caused the projectile to launch and the bottle to move back equally. The projectile went further because it had less mass to it compared to the bottle.
Error Analysis
The bottle rocket fell of the rollers several times thus incorporating friction into our data which was unintentional. The rollers were intended to get rid of the friction variable but the force was just too much for the straws to stay in position. Another possibility for error was how deep the stopper went into the neck of the bottle after each trial. And finally, since we had to make our own troughs, we had to adjust the experiment to however much sodium hydrogen carbonate can fit inside our trough, thus giving us different measurement
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