• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Aim: To investigate the relationship between the angle of a slope incline and the acceleration of a model cart moving down it

Extracts from this document...

Introduction

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.image00.png

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 α (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)

...read more.

Middle

        11. Repeat steps 2-10 again so that you have a 2nd trial (this is handy because you can obtain an average result in order to eliminate any errors)

        12. Repeat steps 2-11 using more books, this will give the 2nd larger angle

        13. Now finally repeat steps 2-11 using even more books, giving the 3rd and final angle.

        NOTE: if still unsure of what to do, I strongly recommend viewing Diagram 1 (the set up) below.  It should become very clear.

Equipment: Usable protractor, Ticker-tape timer (with necessary wiring), flat long wooden board, non-motorized wooden and wheeled trolley, a pile of books or something with height and stability to rest the wooden board on

image01.png

Variables:

        In this experiment I tried to keep all variables constant, with the exception of the angle of the slope which was changed twice.  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.

...read more.

Conclusion

        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.

...read more.

This student written piece of work is one of many that can be found in our International Baccalaureate Physics section.

Found what you're looking for?

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

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Physics essays

  1. This lab will test the effects of the surface area factor on acceleration due ...

    =-1.61 m/s2 2. =-2.16 m/s2 3. =-2.76 m/s2 4.=-4.39 m/s2 Percent Errors (Experimental Acceleration to Theoretical Value, -9.81 m/s2): End of Data Processing Section Conclusion and Evaluation Conclusion The purpose of this accelerated motion lab in free-fall experiment was to investigate acceleration due to gravity and the factors that affect it.

  2. Physics Wave revision question

    On graph 1, draw a labelled line to indicate the amplitude of the wave. (1) (ii) On graph 2, draw the displacement of the string at (2) (Total 7 marks) 55. Wave properties (a) By reference to the energy of a travelling wave, state what is meant by (i)

  1. Forces Lab. I decide to investigate the relationship between the propelling force exerted on ...

    At the red rectangular area in diagram 1, there is an uncertainty caused by the friction between the string and the corner of the lab table. The friction here also consumes a part of the kinetic energy, which decreases the total amount of kinetic energy gained by the weighted margarine tub.

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

    0.90 4 2.00 0.20 2.27 ± 0.63 4.00 0.40 4.54 ± 0.69 6.00 0.60 6.81 ± 0.75 8.00 0.80 9.07 ± 0.81 10.00 0.90 10.21± 0.84 12.00 1.10 12.48± 0.90 Theory (Graph): The volumes of the craters are clearly proportional to the depth of the craters.

  1. In this extended essay, I will be investigating projectile motion via studying the movement ...

    Previously mentioned in the interpretation of graphs, I noticed there was side way motion. Therefore, using a heavier metal ball will reduce the effect of air current on the metal ball. In addition, I should make sure that all fans and air conditioners are not in operation throughout the entire experimental procedure to reduce air current.

  2. Analyzing Uniform Circular Motion

    A straight line graph is then provided from the manipulated equation of, where This relationship is explanatory without an equation. If the radius of a horizontal circular motion is kept constant and the force is kept constant correspondingly, the mass is inversely proportional to the frequency.

  1. Investigating the Breaking Distance of a Cart

    Each round the crate was released to motion with the help of rubber bands. By attaching two rubber bands to the end of the track the releaser for the crate was set up. Pulling the crate with varying extensions with the band would result in differing initial velocities.

  2. HL Physics Revision Notes

    Change in potential energy = force x distance = Eqd Electric potential energy is the energy a charge has as a result of its position in an electric field Change in EPE =(change in V) x q = (Vq) An electronvolt is the energy y gained by an electron moving through a potential difference of 1 volt.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work