• 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 factors which affect the speed of an object travelling in a circular path.

Extracts from this document...


Planning - Circular Motion Background Knowledge: Circular motion is the rotation along a circle. When an object is in circular motion, it needs centripetal force. Circular motion involves acceleration of the moving object by a centripetal force which pulls the object towards the centre of the circular orbit, without this acceleration the object would move in a straight line. Circular motion is accelerated even though the speed is constant, because the velocity of the moving object is constantly changing. A special kind of circular motion is when an object rotates around its own centre of mass. This can be called spinning motion, or rotational motion. Circular motion is characterized by four variables; * an orbital radius, * a velocity, * the mass of the object which moves in a circle * the magnitude of the centripetal force, These quantities all relate to each other through the circular motion equation: Equation of circular motion is Figure 1 Fig1http://en.wikipedia.org/wiki/Circular_motion Figure 2 Fig2http://hyperphysics.phyasastr.gsu.edu/HBASE/cf.html The centripetal force is directed towards the centre and is used in any motion in a curved path representing accelerated motion. The centripetal force is the force needed to move an object in a circle at constant speed. * The smaller the mass, the bigger the centripetal force. ...read more.


4.d 250 20.00 80.00 11.18 5.a 300 20.00 80.00 9.19 9.61 5.b 300 20.00 80.00 9.72 5.c 300 20.00 80.00 9.58 5.d 300 20.00 80.00 9.94 6.a 350 20.00 80.00 9.26 9.04 6.b 350 20.00 80.00 9.11 6.c 350 20.00 80.00 8.34 6.d 350 20.00 80.00 9.45 7.a 400 20.00 80.00 8.72 8.37 7.b 400 20.00 80.00 8.42 7.c 400 20.00 80.00 8.35 7.d 400 20.00 80.00 7.99 Key: hello = anomaly Figure 3: Diagram of apparatus Method: * First we measured the radius of the centre of the bung, the weight acts here. Then we marked the radius with a piece of blue tape as the point of radius, so that the distance can be established when spinning the bung around in order to ensure accuracy. We knew that we were spinning the bung around with the correct radius by making sure that the blue tape was kept just under the plastic tube. * We counted the revolutions by lining the rotations up with our partner who was timing on the stop-clock. * We then made sure that the orbit of the bung must rotate in a circle horizontally to make it a fair test, this is important because firstly it is less dangerous than if you were swinging it around vertically and also the radius would be more accurate. ...read more.


* We counted more than one revolution in my experiment because you cannot time it properly due to human reaction times. So we counted twenty revolutions for best accuracy. * Then we repeated the same twenty revolutions four times to ensure accuracy and so that anomalies could be determined. I ensured that I made my experiment a fair test, by controlling the radius to stay the same constantly from the bung to the plastic tube; I did this by making sure that the blue tape stayed in its place, just below the plastic tube. I also made sure that I controlled the mass of the bung as, as it became heavier it became harder to control so I made certain that it swung around properly in a horizontal circle. I also tried to control the velocity to make it a fair test, but this was less easy to control as it easily changed from slow to fast or fast to slow, without me realizing. Therefore the centripetal force was also much more difficult to control, but I still tried, because it was important to keep it constant, to make it a fair test. I did this by being mainly concerned about the bung swinging around horizontally, as this would mainly cover all the four factors of circular motion by just getting the bung to swing around horizontally. By Anil Vaghela 10SAC ...read more.

The above preview is unformatted text

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. Trolley Speed

    take less time for the trolley to reach the bottom as the gradient becomes steeper and so it will take longer for the trolley to reach terminal velocity. I predict that as the height of the ramp is doubled, the time taken for the trolley to reach the bottom will divide by two.

  2. Investigating the Factors Which Affect the Motion of a Trolley Down an Inclined Plane

    are anomalous and need repeating, rather than having to make an assumption as to which results are erroneous in the table. Diagram of Apparatus Safety There are no real safety issues to worry about, however to be certain that there are no injuries, we will make sure everyone's ramps are

  1. Measurement of centripetal force required for circular motion

    ?T=mw�L, regardless of the angle ?. Measurement: Mass of rubber bung: 0.0115 �0.00005kg Mass of screw nuts: 0.0215 �0.00005kg Tension in string T=Mg= 0.0215x9.8N =0.2107N Length of string L/m 0.2 0.3 0.4 0.5 Time for 50 revolution 50t/s 33.42 38.48 43.51 49.51 Angular velocity w=2?/t /rads�� 9.4 8.16 7.22 6.34 mw�L/N 0.197 0.222 0.232 0.224 Mean

  2. Investigation in to how the force of gravity on a satellite and the radius ...

    force acting on it and how far away it is from the planet. This keeps it in orbit and prevents it from flying off into space. The larger the force acting on it the faster the satellite will travel. We know this because force = mass x acceleration, which means acceleration = force/mass.

  1. Investigate a factor that might affect the size of a crater made by a ...

    ruled out immediately because it took too long for the plaster to set and mistakes were easily made, it would also be difficult to do repeat results. In the pre - test the depth of the crater and also the diameter of the crater was investigated and measured in cm and mm units.

  2. Motion of an object as it slides down a slope at different angles to ...

    The measurement is made from the floor perpendicular to the table edge to the nearest mark that is parallel to the edge of the table. This is because I have chosen to measure l from the bottom of the cylinder - measuring where it cuts the paper will be equivalent

  1. I will investigate the change of velocity and acceleration of a laterally moving object ...

    I will then add another 10g to the weight and repeat from 2. until I have measure the velocity at a mass of 100g. I will repeat this procedure two more times, so that I have 3 repeats Theory There are three points to be considered in the theory.

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

    But apart from that the method that I used was completely successful. From looking at my results I can see that the graph where there is 1 kilo gram on the trolley the last piece of ticker tape is out of place because the other pieces of tape match up

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