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How to better teaching of physics
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Jessica Vandeveventer
Angela Morrow Baker
SCI 155
3 February 2016
Impulse and Momentum Lab
Purpose/Question-
The Purpose of this lab is to use the impulse and momentum concepts to explain what happens when the eggs are dropped onto various objects. Hypothesis–
When the eggs are dropped into the frying pan, they will break open.
When the eggs are dropped into the water, the eggs will stay whole. If we were dropping from a higher distance they would break.
When the eggs are dropped onto the pillow, the eggs will bounce a little and stay whole.
Data Tables/ Graphs –
Frying pan
Egg one
The egg breaks when it is dropped. The eggshell is shattered. The yolk is scramble a little bit.
Egg two
The egg breaks when it hits the pan. The eggshell
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Which scenario did the egg have the biggest change in momentum? Explain your answer.
The scenario that has the biggest change in momentum is the one when you drop the egg onto the pillow. This is because the egg comes to a stop and changes direction, so that is why it has the greatest change in momentum. The change in momentum is calculated by multiplying the force by the time. 4. How would you explain your results using the terms: impulse, momentum, force, and time? Use equations to help you explain the results.
The momentum of an egg dropped into a frying pan at shoulder height is going to be the m x v (mass times velocity). This is going to be the same whether you drop the egg into a frying pan, into a bucket of water, or onto a pillow. The impulse in the egg drop report is the force of the egg multiplied by the time. This is when the egg is in contact with the object and the time that it stays their. When the eggs bounced of the pillow we see a greater change in momentum. We see the momentum come to a stop, but the momentum changes directions. The change in momentum is calculated by multiplying force times time. 5. In light of this experiment, can you offer any advice to children in how to create a device that will keep an egg from breaking when thrown off of their school’s
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I would advise them to make a pillow like contraption that would allow the egg to land on it with out rolling of the pillow.
Claim-
The eggs when dropped in the egg lab will either break or not break upon impact with the object. The eggs will break when they hit the frying pan. The eggs that are dropped into the bucket of water will sometimes break and sometimes stay whole. The eggs that are dropped onto a pillow will not break.
From the bar chart, we see that the potential energy in general agrees with the case above, i.e. it increases up to the particle’s maximum height and decreases from that point on. The kinetic energy, on the other hand, behave significantly differently than expected. Rather than decreasing form the beginning to the maximum height and then increasing, the kinetic energy appears to fluctuate in a somewhat random manner. This can be best understood by treating the experiment as a closed system, where energy (but not mass) can leave the system and enter the surroundings. As the projectile moves through the air, it collides into air particles, imparting some of its energy to these particles in the form of friction, heat and sound, thus losing energy in the process. We therefore would expect the sum of the potential energy and the kinetic energy to decrease over time as the projectile loses energy to its surroundings. However, from the data from document , this also does not seem to be the case. This discrepancy can be explained by including experimental uncertainty, where errors in our measurements can lead to unjustified conclusions. In order to reduce the sources of these errors, the experiment should be run multiple times in ideal conditions, averaging over the results and calculating the resulting averaged energies.
An elastic collision between two objects is one in which total kinetic energy (as well as total momentum) is the same before and after the collision.
For my egg drop project I used 4 cardboard cut outs, half of a bottle, yarn, popsicle sticks, 2 balloons, and a garbage bag. I used the popsicle sticks & the cardboard cut outs to build a box to surround the egg. Then, I glued some yarn to the bottom of the box for cushion. After the glue was dried, I put the egg on top of the yarn and glued the half of bottle around it. I attached the 2 balloons on the opposite side of the box. After doing all of that there was only one thing left to do, which was make the parachute. When I made the parachute, I cut a garbage bag in half and folded it into a square. Then, I cut four pieces of yarn (same length) and tied it to the box from each side of the parachute.
I was kind of worried about the egg breaking because at first we didn’t have a strong parachute, until we found a huge garbage bag to use as a parachute. After putting our newer parachute on, I
My experiment was if an egg was changed by cooking or freezing it will it affect how far it would fly. So I did the tests and my hypothesis was wrong. The frozen egg did not fly the furthest, the raw egg did. The raw egg every time went about 1-2 feet more than the frozen egg did. I think this is because when I froze the egg it gained weight and the raw egg stayed the same. This was enough to make the frozen egg not go as far. In fact the frozen egg flew the least amount of distance except for on the first launch where it came in second. This Experiment change but modified to be more exact by moving it into an indoor facility. This will help with not having to deal with wind or any other weather conditions.
Begin this experiment by putting on safety goggles and collecting all of your materials; a tube, string, rubber stopper, tape, paper clip, washers, and a timer. Begin by measuring the mass of a washer, the rubber stopper, and a paper clip. Also measure the length of the string. Start with four washers on the mass hanger, as seen in the drawn diagram below. Practice swinging the stopper in a horizontal circular motion, holding it by the
The scientific question investigated in this experiment was, “Which household object, when catapulted at a 45 degree angle, will travel the farthest?” The hypothesis in this experiment was, “If four household objects are catapulted at a 45 degree angle, then the standard white dice will travel the farthest.” The independent variable in this experiment is changing the object launched. The dependent variable in this experiment is the change in distance traveled. The control variables are using the same catapult, tape measure, location, and maintaining the same launch angle. The control group is the catapult which remains the same throughout the experiment. The experimental group consists of the four objects being catapulted. The procedures for this experiment go as follows: Step three, place an item in the cup on the arm of the catapult. Step four, pull back the arm until it cannot go back any further. Step five, carefully release the arm which will catapult the object into the air. Step six, record where the object initially lands.
In an elastic collision, the momentum and kinetic energy are conserved. A perfectly elastic collation is where friction and other external forces are negligible. The following equations can apple to perfectly elastic
After he cracked open the egg, he discovered that it had a smaller egg inside of it. Double eggs are a rare occurrence. This phenomenon is known as counter-peristalsis contraction. It occurs when the the egg is forming inside of the hen's oviduct, which is a tube that passes the egg from the ovary. Hens typically release an oocyte every 18 to 36 hours. An counter-peristalsis contraction occurs when a second egg is released before the first one has finished forming.
The angular momentum was different each time because the mass was different. If the mass was the same then the angular momentum would be the same because the law states that angular momentum will stay constant if in an
Purpose: To show that momentum is conserved in a closed system by illustrating the conservation of momentum in an elastic collision and an inelastic collision.
We ran into Newtons First Law, which claims that an object resists change in motion, as the marble rolled down the floor it didn’t stop until it was acted against by friction. As we moved on, Newtons Second Law came into play when we were creating our lever as we need a ball that would roll down with enough acceleration that it could knock down the objects. Newton’s second law claims, that F=MA. So, we choose a golf ball since it would have more mass than a rubber ball, but it would have less acceleration when the lever was started. This way, it would knock the upcoming objects. Newtons Third Law claims that every action yields an equal and opposite reaction. This is proven in our Rube Goldberg Machine when the small car was rolling down the tracks as the wheels pushes against the track making the track move backwards. The track provides an equal and opposite direction by pushing the wheels forward.
Considering the forces between both of the objects, object one and object two, are equal in magnitude and are opposite in direction, and also considering that the time that these two objects acting on each other are equal in magnitude are equal, we conclude that the impulses of the two objects are also equal in magnitude and are opposite in direction.
Then, move the bowl to the side. Take the bigger bowl and break three large eggs. Whisk the eggs briefly until they form a smooth yellow ingredient, then you will add the caster sugar and whisk until you have a thick light yellow substance which looks a bit like a thick milkshake. When lifting the whisk and the mixture it leaves a trail on the surface for a few seconds, and you know that the whisk has done the job.
Crumple zones- are a structural feature used in automobiles. They help by absorbing the impact; this is by spreading the impact through parts of the car instead of in the one spot. This reflects back onto law number one, two and three. This is shown when the car hits the object it causes the car to slow down or completely stop (1). The crumble zone would protect the driver because all the energy has been diverted around the car, instead of the one spot. As a result of the cars mass and its acceleration, the force can be calculated (2). When the car crashes it’s most likely that the object w...