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

Mass of different balls affecting velocity

Extracts from this document...


Kien Vu

Mass of different balls effecting velocity.


In this experiment, I am going to relate the mass of different balls with the velocity


My variables are the mass of the balls, the velocity, gravity, height and bouncing surface.

The only dependent variable is the velocity, because it is dependent on the mass of the balls.

The independent variables are height, gravity, bouncing surface and mass of the balls. So to control the independent variable, I try to drop the ball from a constant height. We have gravitation which is a constant (g=9.81ms^2). Bouncing surface is not significance and I will drop the ball on the same surface. Also the mass of the balls will be controlled by changing its mass.

The relation I want to investigate with velocity and mass is relating to momentum. Since momentum of an object is defined as the product of its mass and its velocity (according to what we have learn in class) image01.png. This shows that mass and velocity is proportional with each other.

...read more.


Uncertainty +-0.20





















The mass in the balls are measured using a weight. The weight is quite accurate so I estimate the uncertainty to be image13.png0.2. The uncertainty in velocity can be found by finding the difference in the largest and smallest velocity for each ball. Which is 0.38msec-1, 0.27msec-1and 0.30msec-1. The average of these ranges is 0.32, so half the range is image13.png0.16 msec-1. However, this uncertainty is too precise so I would the uncertainty is image13.png0.20 msec-1.

Now I will proceed finding the averages to put the values into a graph.

There is no average for mass, because it is measured with an accurate weight so I will keep the estimated uncertainty of 0.2g.

The average in velocity can be found by using this formula image14.png

...read more.


Conclusion and evaluation

To evaluate my result I have to look into the uncertainty and the result. The uncertainty I found was 105% which is very suspicious. It should not be possible, so there has to be reason for this error.

My idea proposed that mass and velocity is proportional to each other. However, my result did not show that proposal. Maybe I should have tried another ball instead of a light ping pong ball of 3 g. This may have influenced the error.

So neglecting my large uncertainty, I found the logarithmic graph to show the best model of the relationship between velocity and mass. Which means my idea of mass and velocity to be proportional is wrong.

To improve my experiment, I could have tried to use more balls with different masses to get a wider data. Maybe I should have measured the velocity of the ball after it bounces and also using a mechanical release to drop the ball.

...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. Suspension Bridges. this extended essay is an investigation to study the variation in tension ...

    � 0.007 38.5 33 0.7523 � 0.008 36.7 0.7100 � 0.007 66.3 38.5 0.7025 � 0.007 41.5 0.6649 � 0.006 84.3 38.1 0.6415 � 0.006 41.2 0.6017 � 0.006 101 34.5 0.5632 � 0.005 38 0.5170 � 0.005 117 27.9 0.4455 � 0.004 32 0.3917 � 0.004 126 23.1 0.3274

  2. Physics IA bouncing ball

    All values of height have been rounded to 0.1cm. Raw and processed data Height h (cm) +0.1 Time 1 t1 (s) +0.35 Time 2 t2 (s) +0.35 Time 3 t3 (s) +0.35 Time average tave (s) Time maximum tmax (s)

  1. How does the mass of a spherical object and the height from which it ...

    Conclusion: The formation of craters can be described as a transfer of kinetic energy into potential energy. It is this transfer that determines how mass and the height from which the object is dropped affect the width and depth of the crater formed.

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

    Calculation of Uncertainties for the Volume of Craters, cm � Uncertainties = � 0.05 Uncertainties = � 0.05 2.00 0.50 � 0.72 4.00 0.60 � 0.75 6.00 0.70 � 0.78 8.00 0.90 � 0.84 10.00 1.00 � 0.87 12.00 1.10 � 0.90 * Fourth Reading Calculation Height of Dropped, cm Depth, cm (d)

  1. Free essay


    * A bucket containing earth * A rock or marble slab (very thin) * A thin piece of plastic Diagram: Procedure: * Simmer sand on the floor, smooth it evenly out. * Place the clamp on the retort stand. * Clamp the ball (this prevents us from applying any force

  2. Investigate the factors affecting the period of a double string pendulum

    type of trend line for both the frequency and period such as exponential and not polynomial. It is because the small total length of the metal bar that this limited the range of values that I could have recorded. I could have until 17 cm (total length of the bar)

  1. Bouncing balls. Research question: What is the relation between the height from which ...

    decimal place To make the experiment more accurate and have more datas to compare, I designed the second phase of the experiment. The method used was the same, but the surface-on which the experiment was carried out- was changed from floor to table.

  2. HL Physics Revision Notes

    decay constant (the probability that a nucleus will decay in unit time). Derive the relationship between decay constant and half-life. T1/2=ln2/λ) N=N0/2 N0/2 = N0e-λt½ 1/2 = e-λt½ Ln(1/2) = -λt½ λt½=-ln(1/2) =ln2 T1/2=ln2/λ Outline methods for measuring the half-life of an isotope.

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