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

Investigation between the relationship of Mass and Time taken while coming down a water slide.

Extracts from this document...

Introduction

Investigation between the relationship of Mass and Time taken while coming down a water slide

In this experiment I am going to investigate the relationship between Mass and Speed of 5 people with different masses coming down a water slide. Firstly, I have obtained evidence by measuring the time taken for people with various different masses to come down a water slide. My prediction is that mass is independent of the time taken. We have used a digital stop watch to measure the time taken of the people coming down the slide. I am going to use several different scientific equations to try and prove my prediction. I also have to take into consideration that the slide is not a straight surface it has several different bumps but I also predict that this has no effect to the time taken as horizontal velocity is independent of vertical velocity because both of these masses are being pulled by gravity at a constant acceleration of 9.8m/s²so all objects free fall at the same rate of acceleration regardless of their mass.

I have tabulated my results according to the different Masses in

...read more.

Middle

Lian

   9.78 m/s

Omar

   9.42 m/s

Abhay

   9.69 m/s

Alan

   9.69 m/s

Calculating the height of the slide

Although we were given the length of the slide I will show how they had calculated by using Pythagoras theorem which says in a right angle triangle the sum of squares of the base and the height is equal to the square of the hypotenuse.

     X² =   55² + 50²                              I cannot be certain if this is the correct

     X² =   3025 + 2500                      as the slide was not a triangle but I am  

     X² =   5525                                   going to carry the error forward to do

     X=   74.3                                     all calculations.

From these results I can rule out the inference, the greater the persons mass the slower a person will go down or faster! This is false because Alan has a greater mass than Omar but his average time was still smaller than Omar’s who has a smaller mass and had a larger time taken.

Back to my prediction which is in a straight that Mass is independent of time taken. To prove this I will use my equation h = ut + ½gt², this is the equation is used whenever an object travels at a uniform acceleration line where h = height, u = initial velocity, v = final velocity, t = time taken and g = acceleration due to gravity which is 9.8 m/s², As you can see mass does not play any role in this equation it is only acceleration that does as it is the acceleration due to gravity.

...read more.

Conclusion

Variation of results:

I am now going to work with the average time taken for the 4 different masses to show you how minor the changes are.

Let’s take Lian who has a mass of 50 kg and whose average time taken was 7.56 and let’s take Alan who has a mass of 64 kg and whose average time taken was 7.63.The difference in mass is 14 kg and the difference in time taken was 0.07 seconds! Even after such a great increase in mass there has hardly been any difference in the time taken.

Let us now take Abhay with a mass of 58 kg and Omar who has a mass of 60 kg which is only a 2 kg change in the mass which is far smaller than the change with Lian and Alan. Abhay’s average time taken was 7.63 and Omar’s average time taken was 7.85, the difference in time taken was 0.22 seconds.

By using these results I can help prove my prediction saying that mass is independent to time taken.

Improvements

To improve the experiment we should have had a straight slide instead of a parabolic surface to be able to calculate  the length of slide more accurately using Pythagoras’ theorem.

We could have used light gates instead of stop watches to get exact readings when students start and stop on the slide this way they could avoid any human error.

Each person could have used the same float as they can all encounter the same % of friction.

We could have used different slides to test the effect of friction on different surfaces.

...read more.

This student written piece of work is one of many that can be found in our GCSE Forces and Motion 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 GCSE Forces and Motion essays

  1. How does an increased surface area change the time taken for a mass to ...

    From looking at my preliminary results, I have come up with my final variables: Maximum height = 260.00cm Minimum height =50.00cm Mass of cup cake = 0.33g (for both cup cakes to make fair test) Prediction My prediction is that the larger the surface area is, the longer the time will be taken for the mass to reach the ground.

  2. What is the relationship between mass of an object and its acceleration?

    Diagram (After modifications) Method (After modifications) As the results from the trial run were not accurate enough to help us answer the question, we modified the method to gain this accuracy. During the trial run, we approximated the mass of the cart to 1000g. The exact mass of the cart during the final experiment is 850g;

  1. In this experiment I aim to find out how the force and mass affect ...

    As the three results for each angle were extremely similar there were no odd results that would have thrown the average off. The angle of the runway was not measured using an angle measurer, instead I used trigonometry which meant the measurement of the angle was much more accurate as

  2. What is the effect of mass on friction?

    Very grainy sandpaper was supplied but during the pilot test it was found that as it the grains were so large, the lighter masses would just glide right over them. Friction is a force that tries to oppose motion. It is caused when two surfaces are in contact, by the

  1. Physics Coursework: To investigate the Oscillations of a mass on a spring

    of the springs, and the relationships between them will be something like this: A straight line is expected when drawing the graph of load against length of spring. Normally the graph should be drawn with the length of spring against the load.

  2. Mechanics 2 Coursework - 'woosh' down the slide

    This has benefits because although we are ignoring the effect of air resistance in the calculations, we should minimise the affect that it has. A lighter object, or one that has a larger surface area (i.e. is less dense), would show more affect from air resistance.

  1. Squash Ball and Temperature Investigation

    With this increase of air pressure within the ball, the ball will deform less when it comes into contact with the floor than it would when it has a lower air pressure because constant, rapid collisions of the air molecules inside the ball help maintain the shape of the ball better at this higher pressure.

  2. The aim of this investigation is to see what the relationship between force, mass ...

    The force of friction is at its maximum between two objects when they are at rest. The angle of friction- the angle to which a surface must be raised for objects placed on the surface to begin to steadily slide, thus the force of friction is removed.

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