• 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...

Introduction

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.

Middle

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.

Conclusion

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. Physics Friction Lab Report

    Then record the electronic scale reading for the mass of the hook + weights hanging from the string. Using g = 10ms-1 you can now also figure out and record the weight.

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

    This affected our results because it was not a fair test due to the fact that not all of the spirit burners were measured directly after the 3 minutes.

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

    The launcher was steadily released so that the box could be pushed to slide on the cement floor. 6. Then the distance traveled by the box was marked by a tape. The closest back tip of the box was used as the mark of the distance travelled by the box.

  1. Qatar's Traffic Control Report

    For a normal business and family car, the maximum speed limit should be only up to 140km/h. For the government cars such as ambulance, police car or the CID agents can go up to 180 km/h; safe speed limits. These vehicles speed limit adjustments doesn't cost a fortune and prepare a better future for Qatar.

  2. HL Physics Revision Notes

    It depends on the speed of the wire, strength of the magnetic field and the length of wire in the magnetic field. Derive the formula for an e.m.f induced in a straight conductor moving in a magnetic field. Fe=Eq = (V/I)q Fm= Bqv V=BIv Magnetic flux is defined as ? = BA (field strength x area).

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