1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Angle Acceleration

Extracts from this essay...


Sasha Zouev. Physics IB, 03/10/05 IB Physics Uniform Motion Aim: To investigate the relationship between the angle of a slope incline and the acceleration of a model cart moving down it Hypothesis: As the angle of the slope incline increases, the acceleration of the model cart moving down it will also increase. I have predicted that acceleration is directly linked with the angle of the slope on which the object is moving. When coming up with this hypothesis, I asked myself the following question, "what forces actually act on the model cart as it is going down the slope". There are in fact three forces acting on the cart. The force of gravity (g), friction (F), and the force of reaction (R) (see diagram 1). If we were to draw a Y and X axis on the object, the X axis showing the movement along and the Y axis being perpendicular to that then we can find out how the forces act. On the Y axis, there are two forces, the force of reaction and a fraction of the force of gravity. Since there is no movement along the Y axis we know that the forces cancel out. To find out the reaction force, we can use the formula R = mg cosine ? (see diagram). On the X axis, there is movement, which means that the 2 opposite forces (friction and the other fraction of the gravitational force) do not cancel out. We know that force is equal to mass times acceleration (F = ma)


The distance the cart descends, the surroundings, the cart used and board were all held constant throughout the trials. I have decided that in order to prove my hypothesis correct, I would need to use at least 3 different angles and use 2 trials for each angle (to ensure validity). The 3 angles I chose to investigate were 25°, 35°, and 45°. In order to record the acceleration for each, I would first need to have a complete record of the motion of the trolley. The dots that would be presented on the ticker-tape would be sufficient enough for me to then calculate the acceleration of the trolley in each case. The following 3 pages contain results of all three ticker-tapes. To understand what the ticker timer tape does and how we can obtain acceleration from it, see "Analyzing Results". Also from those results I have constructed velocity-time graphs (attached) for all trials of all the angles. Results: See following pages Analyzing results (Finding acceleration): In order to analyze the results, we first marked off sections on the tape with 5 dot spaces. This means that 1-dot space is the distance traveled by the trolley in 1/50 second (0.02 s). So 5 dot spaces is the distance traveled in 1/10 (0.1 s) If the tape is chopped into its 5 dot-spaces sections, and the sections put side-by-side in correct order, the result is a chart very similar in appearance to that of a speed vs. time graph.


There was no measurement of time with a stopwatch, however I when I cut up the pieces of the ticker timer tape to be analyzed, that is where errors could have been made. The precision of cutting, and then measuring with a ruler only gave correct measurements to the nearest millimeter. One of the errors I avoided early on while analyzing was to assume that the acceleration was constant since it was partly gravitational. In labs like these, even the most obvious and logical factors may not be just assumed, steps most be taken to prove it. the importance of the errors is very small indeed as seen from the difference in the two trials for each angle was insignificantly small. Also for the aim I chose, and the nature of this experiment, the errors were always unlikely to get in the way of the final result. If granted another opportunity to repeat this experiment, I would certainly change some things. First of all I would chose to perform more then only 2 trials for each angle. I would opt for about 10 trials, then find the average of the 8 best and use that as the final result. Also I would like to experiment with more then 3 angles. As hard as it might be, I would like to try a very steep angle, around 70°. Moreover, it would be interesting to see the effect of mass in terms of acceleration. Perhaps try carts with different weights. All in all, the experiment was a success. The small errors did not alter the answers too greatly. The accelerations of both trials where close enough to each other. And my hypothesis stood correct.

The above preview is unformatted text

Found what you're looking for?

  • Start learning 29% faster today
  • Over 150,000 essays available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Over 180,000 student essays
  • Every subject and level covered
  • Thousands of essays marked by teachers

Related International Baccalaureate Physics

  1. Investigate the Size of Craters in Sand Due to Dropped Object.

    Thus, in order to sketch the graph of the volume of craters against height of dropped slotted mass, we can represent the y-axis or volume of craters by using the depth of craters itself. Calculation of the Graph: In order to sketch the graph, we need to find the average or mean of first, second, third and fourth reading.

  2. Physics Airtrack Experiment. The effects of angle on the acceleration of a glider on ...

    It is almost unrealistic to have an acceleration of 18.947m/s-² for such a small inclination. A couple of problems that caused random and sytematic error that occurred during the experiment was the fact that the rubber band stopper allowed the glider to bounce back into the path of the second

  1. Aim: ...

    take out the mg = mg (sin ? - u cosine ?) and that is all equal to ma = mg (sin ? - u cosine ?) divide both sides by m a = g (sin ? - u cosine ?) In our experiment, the angle (?) will range from 0-90 degrees, and by looking at the formula above I have predicted that as the ?

  2. HL Physics Revision Notes

    superposition: The effect of two separate causes is equal to the sum of the separate causes. Constructive interference occurs when two waves are in phase with eachother. The resultant displacement is the sum of both displacements. Destructive interference occurs when two waves are out of phase.

  1. Uniform Motion Lab. This experiment will measure the motion of a cart moving on ...

    Displacement (m) Velocity (m/s) 0.1 0.187 1.87 0.2 0.352 1.76 0.3 0.529 1.76 0.4 0.702 1.76 0.5 0.872 1.74 0.6 1.034 1.72 Table 1.3 Velocity as a function to Time Analysis:- Velocity calculated by the formula 1. V=0.187m/0.1s V=1.87 m/s 2. V=0.352m/0.2s V=1.76m/s 3.

  2. Analyzing Uniform Circular Motion

    The frequency, as a result, decreases. However, a linear graph is then attained from using the formula;. The graph is a straight line because f2 is indirectly proportional to r. The original formula does not have any y intercept, however for the equation gained from the graph above there is a definite y intercept or b value.

  1. Determining how the height of release affects the velocity of a basketball

    / 3 = 28.2 seconds. In order to find the uncertainty for the average time we have to use the following process: You take the average time and then you subtract it by the highest time. Additionally you take the average time and subtract it to the lowest time.

  2. Projectiles Lab - From the experiment I conclude that indeed, the range of a ...

    Although not that significant in the long run, when we concluded that the maximum range is obtained by firing somewhere between 40 and 50 degrees, it was vital to have more accurate measurements because the difference between the two is so great.

  • Over 180,000 essays
    written by students
  • Annotated by
    experienced teachers
  • Ideas and feedback to write
    your own great essays

Marked by a teacher

This essay has been marked by one of our great teachers. You can read the full teachers notes when you download the essay.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review on the essay page.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review under the essay preview on this page.