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

Does the mass of a block of wood effect the size of a frictional force?

Extracts from this document...


Does the mass of a block of wood effect the size of a frictional force?

Preliminary experiment

First we chose a block of wood, it weighed 105g. A Newton metre was attached, which would measures the frictional force exerted on the block when dragged across a surface.

We tried doing the experiment on a smooth surface (table top), but there wasn’t enough friction for an accurate reading. Also when we tried to measure the force with just the block and only a 50 g weight attached the Newton metre did not even give a reading as there was not enough friction on the surface. We then tried carrying out the experiment on a wooden surface (an old drawing board) but again the results weren’t very clear, due to lack of friction. Finally we carried out the experiment on the floor (anti-slip vinyl flooring), the results were much clearer as there was much more friction.

Results for preliminary experiment

Mass of block (g)

Extra mass placed on block (g)

Total Mass (g)

Force exerted on block on the smooth surface (N)

Force exerted on block on the wooden surface (N)

Force exerted on block on the rough surface (N)  













...read more.



We were given a block of wood, which weighed 105g; to the wood we attached a Newton metre, we pulled the Newton metre with the wooden block attached to it across an area of flooring. The Newton metre measured the force of friction and we recorded the results. We then added an additional weight of 50g to the block of wood and repeated the experiment. We did this again but added an 100g, 150g, 200g, 240g and a 300g weights and recorded all these results. I repeated this 3 times.


  • Use the same surface throughout the experiment
  • Keep the same person pulling the block
  • Keep the speed at which you are pulling the block steady
  • Use the same person to read the Newton metre each time
  • Use the same Newton metre
  • Use the same block
...read more.



We can see from this graph that my results were proportional and that there are not any obvious anomalies. We can see from the arrow I have drawn on the graph that my results are not completely directly proportional. This is because the line does not go through the origin. It is very close though, so I think that my experiment was very accurate. From the line of best fit I have drawn, we can see that there is 1 small anomalie. I have worked out however that it is only 3% away from the line.

I think that my results were more accurate as I repeated the experiment 3 times, and then I averaged my results. This therefore made my results more accurate. We can see that my results are accurate from looking at the graph.

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Fields & Forces 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 AS and A Level Fields & Forces essays

  1. Peer reviewed

    Investigating the forces acting on a trolley on a ramp

    5 star(s)

    From here, it was possible to convert each of these percentages into an actual uncertainty. While this may have appeared to have been a lot, there was a lot of error in the experimental setup, despite best efforts to reduce systematic error.

  2. What Affects the Strength of Magnetism Exerted By an Electromagnet?

    What is an 'Electromagnet?' An 'Electromagnet' is often a core of metal with magnetic capabilities (Iron, Cobalt or Nickel) in a coil of wire. When the wire has no current flowing through, the metal possesses no magnetic ability. However, when the current is passed through the wire, the core has magnetism induced into it.

  1. Force of friction

    against the applied force was plotted. B. Coefficients of friction for the wooden blocks 5. The spring balance was connected to a wooden block. It was then pulled slowly until the block started to move. The value of the applied force () that just set the block in motion was recorded.

  2. Investigating the Mechanics of the 100 Metre Sprint

    This table shows Maurice Greene's split time and speed in 10 metres interval. Distance (m) Time (s) Speed (m/s) 0 0.00 0.00 10 1.71 8.71 20 2.75 10.47 30 3.67 11.14 40 4.55 11.50 50 5.42 11.67 60 6.27 11.80 70 7.12 11.68 80 7.98 11.57 90 8.85 11.51 100

  1. Charge To Mass Ratio For An Electron

    second, because any equation of motion which involves electrodynamics forces on the electron brings the charge and mass together as this ratio. Just before 1900, many workers were doing experiments with electrical discharges in low pressure gases, and in particular, with "cathode rays", strange emanations from discharge cathodes, which could

  2. Investigation to find out what affects the size of a shadow.

    So the further away the object is less light gets blocked out. To show how this works I will go on to draw a scale diagram, which will show roughly how big the shadows, will be. Distance from screen (cm)

  1. Maths Coursework – Artic Research

    Total time is 2T = 2 ? 0.258 = 0.516 = 31 minutes 36 seconds. The next observation site will be east of the base camp, at 90?. Base camp Observation site Resultant velocity Aircraft speed 200 kmh-1 Wind speed 50 km h-1 Speed of aircraft = 200 kmh-1 +

  2. A1 Force of friction(TG)

    from the graph. The slope of the straight line () = 0.26 10. Repeat steps 5 to 9 by replacing the wooden block with the bricks. Find the values of�s and�k for the bricks. Number of blocks 1 2 3 4 Applied force (F)

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