The purpose of my experiment was to determine how different surfaces affected the speed of a toy car. My hypothesis was that if I change the surface to concrete then the speed of the toy car will increase because the car will have more traction, due to the rough texture, giving it more acceleration, giving it more speed. My results showed that when I changed the surface to asphalt then the speed of the toy car increased. I know this because the toy car had the highest speed of 2.8 miles per hour on the asphalt surface. My hypothesis was supported because I had predicted that the toy car would perform the fastest on the asphalt surface, and it did. I thought that if I change the surface to concrete then the speed of the toy car will increase
However the inconsistencies in the data were that we had designed a fair test and therefore we could only test on modification at a time. One inconsistency in the data depended on which person in my group wound the lever and string which propels the mousetrap car to go down the runway this causes an icosistinsy in the data as each one of us will whines the string on the mousetrap a different way therefore causing an inconsistency in the data.
The purpose of this project was to find out if there is a difference in the strength of different types of hair. I wanted to see if color or chemicals made a difference. My hypothesis was that blonde hair was stronger than brown hair and chemically treated hair. Individual strands of hair were collected from 30 female subjects. I tied one end to a hair hanging device and the other to a baggie. I added pennies into the bag until the strands broke, which is how I determined their strength. My testing showed that brown hair was the strongest and held an average of 27.9 pennies. Chemically treated hair held an average of 14.9 pennies and blonde
The hypothesis about the CO2 angle will change the speed of the car was, rejected. The hypothesis was that if a Pinewood derby car had CO2 inserted at a 20 degree angle, then the 20 degree angle would work best because the angle would keep enough thrust power and keep the car on the track. However, the 20 degree angle was the second best because the 180 degree angle had more thrust power to it then the 20 degree angle. The control group was the 180 degree angle and it’s average was 1.33 second. The 45 degree angle was the longest with an average of 2 seconds. The 20 degree angle or second experimental group had an average of 1.67 seconds. I got these results because each angle that got farther from strait started to lose the amount of thrust that the 180 degree angle had. So if I tried it with a 90 degree angle then the car wouldn’t be moving at all.
We were given groups to design and make a mousetrap powered car that will roll as far as possible. This will be measured and be put into a graph. We will make three modifications to our mousetrap car over the course of the experiment. We have a variety of different materials, including plastic, wooden wheels and a dowel, screws, mousetrap, blue tack and a piece of string. Forces were acting in a negative way and a positive way on the car. Gravity was pulling the car down to the ground. Uplift was pushing up upon the car against gravity. Drag was also known as friction, holding back the car while it was moving. Thrust was in the cars favour, pushing forward against the force drag. There were also many forms of energy being used and being wasted like heat and sound energy. Potential energy was stored in the mousetrap, propelling itself forward. Kinetic energy was also demonstrated when the car started to roll.
Newton's Second Law states the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. The formula helps explain all of the information above and it is force equals the mass times the acceleration. You can measure the mass of the car. To find the acceleration, you subtract the initial velocity from the final velocity and divide it by time. Velocity is a speed in a given direction.
The two types of friction of the mousetrap car are rolling friction and static friction are the two types of friction that may affect the performance of the mousetrap car. The problem of the friction did I encounter and how do you solve them one types of friction i encounter was the static friction I had to take off some glue from the stick that had my wheels and to open eye screws. The factor did take into account to decide the number of wheels you decide to chose for the mousetrap car I saw a video of a car that had 4 wheels and it ran really fast, so I thought a 4 wheeled car would run fast or at least the four meters. What kind of wheels did I use in each axles I use tires as my wheels on each axles. I think the affects on using big wheels
The purpose of this experiment was to determine if cats have a color preference. I wanted to do this experiment because I took an interest in my cat’s vision. My hypothesis was that my cat would prefer the color blue. I used 5 different colored balls of yarn. They were placed in the same spots and sequence each time. I conducted this experiment for a total of four-weeks. I set my cat up behind a line of painter’s tape and let her approach a yarn ball and play with it. I recorded how many times she approached each color. At the end of the experiment I discovered that my hypothesis was not supported. My cat chose to play with the yarn colored black rather than
2. This experiment is not able to support Matthew's hypothesis. Suggest specific improvements that will allow the experiment to more effectively test the given hypothesis. Explain why these changes are improvements.
The tests results for the two cars were incredibly different. As the results of the second car was a lot better than the first one. The lowest score for the first car was only 0.8 metres compared to the remodelled car's 4.7 metres, almost 4 metres further. The furthest the first car made was 3.7 metres whereas the remodelled car achieved 7.2 metres, 3.5 metres further.
The balloon powered race car will be powered by the balloon. The balloon will be blown into and the straw will be the source of the air going into the balloon and then pinched so there is no release of air, then release the air, measure the distance and speed of the car when air is released. This uses the three Newton laws and they are when an object is at rest it stays at rest and an object is in motion it stays in motion in a straight line at constant speed unless acted upon by an unbalanced force, the next is the acceleration of an object depends on the mass of the object and the force applied, the last is every action there is an equal and opposite reaction.
This lab has taught the scientific methods that can be used to gather and test the data to complete a required experiment.Through the scientific methods I was able to develop a hypothesis and test it by collecting the data. As our hypothesis stated that Blue fish is most dominant in our lake because of less predatory threats.But after collecting the samples of fish from the lake We were not able to prove our hypothesis.As according to the data we collected the blue fish was less dominant as compared to green fish.So we compared our data to average class data but still we were not able to prove our hypothesis as green fish was most dominated in the lake because green fish had less predatory threats compared to blue fish .Thats why blue fish
This experiment was about comparing different heights of track with the speed of a toy car. We changed the height of the track three times, we timed the car going down the track each time and got the following results. The higher the ramp was, the faster the car went down the track. We first started with the height of the track at 2.19 meters and the average speed was 3.03 mps, which turned out to be the second slowest average track time throughout the experiment. The second track height we tried was 1.2 meters. The average speed for this track was 2.97 which was also the one of the slowest average track time we had recorded. This track was the lowest height and in the end the average speed was the lower, which proves our point that if the
Another force that was acting on the car was friction, friction was acting on the car because the piece of wood was very rough and had little ridges on it which was rubbing on the car which would cause it to slow down a little bit. The direction that the forces were going was pretty much everywhere, gravity was going down and friction was going forwards and backwards. The car did not work well with the friction because the friction would cause the car to somewhat lose control and go off the side of the ramp, the car did not work well with the gravity either because the gravity is what cause the car to fall and crack the egg. Some ways that we could minimize those forces is by making wheels for the car and making the bottom of the car smooth to reduce the amount of friction, we can't really reduce the gravity in the car but one thing that we could do for that is make the car really light but with a lot of padding for the egg. The reason I say we could make it really light is so that when gravity is acting on the car the car won't fall as fast and would somewhat glide down to the floor with a soft landing for the
At 15 cm high, between 30 and 60 cm, the toy car accelerated at an average rate of 7.9 cm/s2 . Lastly, at 10 cm, the car accelerated at a rate of 23.8 cm/s2 between 60 and 90 cm. When the ramp was 15 cm high, between 60 and 90 cm the car accelerated ata rate of cm/s2 . The data clearly shows a positive trend because when the height of the ramp increased so did the acceleration of the car.
My group and I are building a toy car that is powered by rubber bands. The materials that we were allowed to use for this car project were cardboard, rubber bands, pencils, wooden skewers, tape, glue, CDs, plastic lids, and paper clips. Our car cannot be more than 30 centimeters in length and 15 centimeters in width. We have to make our car travel at least 3 meters.