To do this we are going to do the ticker tape experiment where an accelerating body pulls a tape through a consistent 50 dot per second ticker timer. Introduction: As the speed of moving object and rate, the forces acting on the object, the mass of the object, and gravitational force of it might affect the acceleration, I will investigate about the mass of the object. However, friction can be reduced by the use of: - Bearings, - Lubrication, - Streamlining. Students work on this assignment for the remainder of class and finish for homework. Independent, dependent, and controlled variables: Variable Manipulating, measuring, or controlling variable Independent variable The primary alcohol used Different alcohols methanol, ethanol, and 1-propanol will all be used within their respective spirit burners. If any of the numerous variables is varied however, the results could be totally different due to the energy either increasing or decreasing. Introduction: Acceleration is the rate of change of the velocity of a moving body.
Plot net force on the x axis since it is the input variable against acceleration on the y axis since it is the output variable. Unit Focus The Forces and Motions unit focuses on gravity exerted by Earth on objects, while at rest or during motion. With each stage in this lesson model, I select strategies that will serve students best for the concepts and content being delivered to them. Potential energy is the energy associated with the forces that depend on the position of the object. These results will be taken over a range from 0. Classical mechanics, Energy, Force 485 Words 3 Pages toothpick, I found out the hard way.
Therefore, the slope of the graph represents the net force acting on the cart. List the sources of information that you have used. Therefore, our hypothesis of the experiment was partially correct. Force in physics, is defined as any action or influence that accelerates, or changes the velocity of a certain object. Record the initial velocity, the final. The rate of change of velocity is called acceleration.
I used my judgement to decide on a representational average which excluded these. Also, if I were to do it again, I feel that we could extend the experiment. What would you do with a book like that? Thankfully there were not too many anomalies and we had enough results to decide which results were anomalous and omit these and still have enough results to find an accurate, reliable average. I am looking for them to make the connection to the words force, mass, and acceleration. After a few rolls, I ask them to think and write an observation on their whiteboard. Resistive force is approximately 0.
With these energies defined, total energy of the system is the sum of its kinetic energy and potential energy at any point in time. The first method to find the acceleration due to gravity uses a Photogate Head monitors and a ruler with stripes using black tapes whereas second method uses an Air track and a stopwatch to measure the distance and time to find the acceleration. It was here; while he obtained his degree, that Newton devised the theory of Calculus. Pull a trolley with a fixed force along a bench. That way, if you have very conflicting results, it is easier to see which the anomaly is and which the two reliable results are. However I believe that the acceleration can only increase to a certain extent hence eventually the acceleration will level off and remain the same. We could've used an air bed under the trolley, instead of wheels, to remove the effects of friction.
With multiple learning experiences, students can gain new ideas, demonstrate thinking, draw conclusions, develop critical thinking skills, and interact with peers through discussions and hands-on activities. This indicates that there was constant positive acceleration b. In the second experiment the resistive force of the system is proved to be inconstant as the mass of the trolley increase and this could cause errors on the results I obtained from the first experiment because the mass of the trolley is not constant and I assumed the resistive force to be constant in the calculation. He accomplished a lot during his time and influenced the world a great deal. With this information we than discovered the average acceleration, mine was. Put 500g 5 x 100g on the trolley.
The law simply states that the acceleration of an object depends on the net force acting upon the object and the mass of the object. Mass of the trolley — 98. Connect data logger to your laptop and to the two light gates. Our line of best fit in each section, in this case section a is a straight line. Attach string 2m in length to trolley, and to pulley. I was expecting more of a curve and I think that if I had again gone further than 40cms I would have been able to draw more from this graph. You can experience the first law in a stopping car, the second when you are a pushing a shopping cart, and the third one in the water.
One force Fl, with magnitude 50 N is indicated. What factors might affect your investigation? When changing the force it is important to keep the mass of the system constant. Preliminary Work Before the actual experiment took place, we decided to do some preliminary work. Force is a vector, which in other words means that it ha both direction and magnitude. What is the ball's velocity relative to the ground, if the pitcher throws the ball towards a The front of the plane? Next, we threaded a piece of string through the trolley and attached it to the pulley at the opposite end of the runway.