The Factors Affecting the Stopping Distance of a Margarine Tub
Aim:
To investigate the factors that affect the stopping distance of a
catapulted margarine tub. In this experiment, I will be concentrating
on the effect that varying the mass of the catapulted tub has on its
stopping distance (sd.).
Introduction:
Things that move eventually have to stop. However, where they stop
depends on several factors- their mass (the mass of the moving
object), the speed the moving object is going at, the friction between
the surfaces and the air (or water) resistance and movement around the
object. The stopping distance (or sd.) of an object is how far it
travels before stopping.
As an object moves forwards, it has kinetic energy (KE) pushing it.
However, as it moves, it also creates friction. This changes the KE
(kinetic energy) of the moving object into heat energy. This means
that there is less KE and more friction. The forces become unbalanced
as more and more of the KE is transformed into heat energy. The force
pushing the object forwards is then less than the force pushing it
back, so the tub stops moving. The larger the force of friction acting
on the object, the faster it loses speed.
The type of surface that the catapulted margarine tub (or any moving
object) is moving along also affects the amount of friction that acts
on the object. A very smooth surface - for example, a mirror- would
create much less friction than a very rough surface- for example,
sandpaper. This in its turn would also affect the sd. of the tub- for
a smooth surface, the stopping distance would have lengthened, and for
a rough surface, the sd. would be shortened.
If a margarine tub uses a stretched elastic band to catapult it
forwards, then the amount the elastic is pulled back determines how
far the object travels before stopping. When the elastic band is
pulled back then it has Elastic Potential Energy (EPE) which is
changed to kinetic energy (KE) when the band is released.
Table 1 represents the mass of the block that was used throughout this experiment, which was found to be 0.467kg. In Table 2, the normal force and peak static frictional force were found for the wooden block alone (Table 1) and when it had 500g or 1000g of additional weight. To calculate the normal force, the weight of the block (including the weights added if applicable) was multiplied by gravity. As shown in Table 2, when no additional weight were added to the block, the normal force was 4.58N and the peak static friction was 1.775N. When 500g of weight was added to the block the normal force was 9.48N and the average peak static friction was 3.688N. Then, when 1000g was added to the block the normal force was 14.38N and the average peak static friction was 5.391N. Figure 2 demonstrates the results of the average peak static friction values vs. the normal force,
A box and pan bending brake is used to bend sheet metal. Box and pan shapes can be formed with these bending brakes. These brakes are also referred to as a bending machines. A number of blocks are included in a clamping bar of a box and pan brake. The removal and rearrangement of these blocks, allow bending of pieces of sheet metal. How are these brakes used? How do they operate? The following post will answer the questions and explain the operation or working of a box and pan bending brake.
However, it is obvious that the tennis ball was most affected by friction, as it has the greatest difference between the theory and data. This was also visually apparent during the experiment. It was observed that the tennis ball slowed down considerably more that the other two balls. This is because the outer surface of a tennis ball is made from a furry cloth material, which generates more friction that a smooth surface, like the other two balls. (Bowden, 1951, pg. 302; Tremaine and Weinberg, 1984)
Throughout history we recognize its figures and events but never the elements involved. Sam Kean masterfully speaks for those lost elements in one book of historical events and each story a true piece of history and each element an unsung hero or villain.
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Reese Witherspoon is a lovely actress whose performances touch the hearts of many. Known for roles such as Pleasantville, Legally Blonde, and Walk the Line, this actress’s work has reached the globe. There are a good number of things many people don’t know about her, and these are a few. Stay tuned for the next part of the article, which is coming soon!
Prompt: Define Newton’s Third Law, give three effects of it, and create an experiment designed to explore one aspect of it.
Projectile-throwing machines are found in three main categories: the catapult, the ballista, and the trebuchet (How Stuff Works). The catapult has a lever arm attached to a “bucket” that is usually pulled back by rope and the projectile is released when the rope is cut (How Stuff Works). The ballista is basically a giant crossbow and the trebuchet is similar to the catapult but is a weighted beam with a sling carrying the projectile (How Stuff Works). In this examination, we will mainly be discussing the design of the catapult and trebuchet.
Upon entering the magazine aisle at the local grocery store, one is overwhelmed with hoards of publications targeted at every type of person imaginable—outdoorsmen, homemakers, car-lovers, and the list goes on. In the rows and rows of these diverse magazines, lays one meant just for teenage girls. Seventeen magazine entices girls aged 13 to 18 with fun, colorful fonts and widely-known cover models in trendy clothing. On one of the magazine covers alone, Seventeen promises to teach girls how to own their school year, amp up their confidence, and get their parents to chill, all while giving them the chance to win a 1,000 dollar fashion haul. Seventeen seems to almost act as a bible for teenage girls, and if they take it as seriously as they do
In ten days you will be able to answer this important question and make a contribution to science!
In this inquiry the relationship between force and mass was studied. This inquiry presents a question: when mass is increased is the force required to move it at a constant velocity increased, and how large will the increase be? It is obvious that more massive objects takes more force to move but the increase will be either linear or exponential. To hypothesize this point drawing from empirical data is necessary. When pulling an object on the ground it is discovered that to drag a four-kilogram object is not four times harder than dragging a two-kilogram object. I hypothesize that increasing the mass will increase the force needed to move the mass at a constant rate, these increases will have a liner relationship.
Cookie dough ice cream cookie pieces mixed with ice cream The best ice cream is cookie dough ,cookie dough is one of the best ice cream because of its favors. Cookie dough originated at the Ben & Jerry's Burlington Scoop Shop.
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.
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Investigating the Effect of Drop Height on the Depth of Sand Aim: To investigate the depth of the sand depending on the height at which the ball is dropped from. Variables: Independent variable chosen: The height at which the ball is dropped Dependent variable chosen: The depth of the sand after removing the fallen ball from it. Constant variables and how they will be controlled: Variable How we will keep it constant Amount of sand We leave the sand in the bucket and make sure that none spills over. Type of sand Use the same one for each trials Ball Use the same ball for each trial, with the same size, volume, material and brand.