• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5

Investigate one factor which affects the time taken for a paper cone to fall a known distance.

Extracts from this document...

Introduction

GCSE Physics Coursework- Terminal Velocity

Aim

The aim of this investigation is to investigate one factor which affects the time taken for a paper cone to fall a known distance.

Introduction

Terminal velocity is the point at which air resistance becomes equal to the gravity acting on the object. There is no acceleration accruing when an object reaches terminal velocity, however the object continues to move at a constant speed.

Two factors affect terminal velocity of an object, the weight and the surface area. If an object is heavy and has a small surface area, then the object will take a long time to reach terminal velocity. However if the object is light and has a large surface area, it will not take long to reach its terminal velocity.

Plan

I will be investigating how surface area affects the terminal velocity of a card cone. I have chosen to investigate surface area because it is easier to be more precise and I will get a better range of results. If I investigated how weight (or mass)

Middle

Prediction

I predict that the larger the surface area the faster the cone will reach its terminal velocity. If there is a small surface area, the cone will fall faster, reaching its terminal velocity slower. This is because there is less air resistance compared to gravity due to the small surface area.

Obtaining- preliminary experiment

These are my preliminary experiment results from a drop height of two metres.

 Angle Surface area in cm² Attempt 1 (s) Attempt 2 (s) Attempt 3 (s) Averages (s) 50o 270 1.13 1.05 1.13 1.10 100o 227 0.92 0.72 0.88 0.84 140o 192 0.61 0.66 0.63 0.63 160o 174 0.66 0.60 0.62 0.62

I found out that the best drop height was two metres because we got the best results with this height. I also found out that the larger angles do not have definite results, therefore I will not go above 140o.

Conclusion

2 drop on the second attempt, causing the average for the three attempts to be higher. I would of liked to have taken the investigation further by investigating how weight affects terminal velocity so that I could be sure how these two variables affect terminal velocity together.

Evaluation

I think my results were reasonably reliable. There were some variables that I would have liked to have controlled a bit better, such as the drop height and drop method. The drop height was not exactly the same each time as it was hard to keep the rulers pointing straight up, one on top of the other. Also I would ideally have liked a mechanical drop method, which released the cone from exactly the same height each time and did not help the cone to fall in any way. Our experiment may not have been fair in that respect because we took terns in dropping the cone, therefore each having our own ‘precise’ way of dropping it. The same goes for our timing. We each took terns timing and everyone’s reaction times are different and it is therefore difficult to time the drop exactly as it is.

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

Here's what a teacher thought of this essay

3 star(s)

This is a good attempt at a report on a practical.
1. The introduction is well written but very brief.
2. The apparatus and fair testing sections are good.
3. The data is well presented in the tables but the graph is missing.
4. The conclusion does not cover all of the necessary aspects required.
5. The evaluation is well written but should also suggest extensions and include the anomalous results.
*** (3 stars)

Marked by teacher Luke Smithen 22/05/2013

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

Related GCSE Forces and Motion essays

1. The aim of this experiment was to compare the elasticity of arteries and vein ...

4 star(s)

Calculations for results: As the results table was rather extensive, it was important to make sure that the calculations for the results were accurate. Percentage change in length: The most important calculation used was to find the percentage change in length of the tissue after a mass had been applied, or removed.

2. Determining the acceleration due to gravity by using simple pendulum.

so as to get the acceleration due to gravity by the derived formula. Even if we plot a graph of Velocity against Time the slope of the graph or the gradient would give us the acceleration due to gravity SOURCES PF ERRORS Sources of errors are always present for this experiment.

1. Bouncing Ball Experiment

This means for the ball to reach terminal velocity the drag force has to be bigger and for the drag force to be bigger the ball has to fall faster (so that more air particles hit the ball every second).

2. INVESTIGATING HOW STEEPNESS AFFECTS SPEED

because I know that with a bigger one I would have fewer errors). * I then weighed the mass of the 3 balls, which I chose to use. * Next I placed the ramp on the books, and measured its vertical height.

1. Investigation is to see how changing the height of a ramp affects the stopping ...

My second graph also proves that as the speed of the toy car increases so does the stopping distance mainly due to above reason. Also the Kinetic Energy that the car gains as it goes down the ramp makes the car to overcome the frictional forces acting on the car

2. An Investigation into the terminal velocity of steel ball bearings in Glycerol.

In experiment t2, the balls may have drifted to the side of the tube and so may have experienced additional friction forces, which would generate these unusual timings. t average (s) 3.43 3.615 3.735 4.21 You can see from the graph that the ball bearing is falling at a fairly constant speed.

1. To investigate how the angle of a slope affects the acceleration of a marble.

Place the marble at the top of the slope. Start the stopwatch at the same time as you release the marble and then stop the watch when it reaches the end. Do this 3 times and take the average speed to try to remove anomalous results.

2. Report on Newton's laws of motion

Perform the same experiment with the same conditions, but instead of changing the applied force, you change the mass of the block. After doing this experiment, you will conclude that the magnitude of the object?s acceleration is inversely proportional to its mass (Serway, 2004).

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