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

Coefficient of friction lab report

Extracts from this document...


Aim: To determine the spring constant(k). Introduction: Force applied on a spring to elongate it. The weights of the masses are the forces on the spring. Applied force=WEIGHT Weight is the gravitational force on the objects. Weight is equal to mass times gravity acceleration. W=m.g Weight(W) has a unit of N Mass(m) has a unit of kg. Gravity acceleration(g) has a unit of kgms-2. The extension of the spring is measured by initial and final length of the spring. Extension=final length ? initial length Extension(e) has a unit of cm. ...read more.


We did nine trials to get our datas. The dependant variable is extension and the independent variable is mass for this experiment. Significant controlled variable is the spring. Conclusion and evaluation: For the spring constant k, we found k=0.1163±0.0009Ncm-1. The real result is k=11.63±0.09Nm-1 in SI unit. The spring constant k, is a measure of the stiffness of the spring. It has a indirect proportion with extension, so measure in the mass and extension of the spring several times and recording them than dividing the weight by the extension should give us the spring constant. The range of uncertainty is calculated by using the uncertainties of weight and extension. ...read more.


The uncertainty of our masses was very small compared to that of the ruler's. It did not affect our result at all since during the graphing the error bars were to small for the weights. The ruler on the other hand gave us an uncertainty that was enough to draw error bars. The main source of error arising from the experimental method during the measuring by the ruler, our precision was not enough because of the spring's little ossilation. We were not efficient with our time since it took lots of time to measure the lengths of the spring while it was ossilating. We think that if we had not to wait for the end of ossilations so much, we could have easily done more than five trials. ...read more.

The above preview is unformatted text

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. Finding the Spring Constant

    *Remember that . If we square both sides of this equation we get: Since we have plotted T2 vs. m, then the slope of the best fit line is related to the spring constant. The spring constant k = (4?2 /slope)

  2. Research question: Part A : What is the static friction coefficient of ...

    Horizontal length, cm Coefficient, Wood / wood 31.4 69.2 0.454 Wood / sand paper 14.2 18.1 0.785 Wood / glass 5.7 18.1 0.315 Uncertainty; e.g Surfaces Coefficient, Wood / wood 0.454 Wood / sand paper 0.785 Wood / glass 0.315 Part B; F = ma mg sin - = ma

  1. Determination of Coefficient of Friction

    When I added 3 weights, normal force = 3.60 N; When I added 4 weights, normal force = 4.60 N. To determine the � kinetic I will use the formula: Ffr. = �kinetic x FN -> �kinetic = Ffr. / FN Further I provide the calculations of the � kinetic

  2. Lab Report " Which fuel is the better source of energy?

    This set of results proves that my hypothesis is wrong because I predicted that the greater the number of carbons in the fuel then the more energy would be released. However this was not the case so therefore the hypothesis of my experiment is incorrect and has been proven wrong.

  1. Physics Friction Lab Report

    using the electronic scale. Do not rely on the mass readings on the masses themselves, as time and wear has significantly decreased the mass shown. Data Recording 10. Now you will record the two masses in a data table. First of all, record appropriately the mass of the block and

  2. Investigating the friction created on different surfaces. Factors that affect range of catapult

    Then the launcher was pulled to a distance of 15 cm from the place where the rubber bands were attached to the legs of the catapult. The spot was marked with a tape. 4. The box was placed on the floor against the launcher of the catapult whilst its glass side exposed downward to the cement.

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