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

Group 4 Friction Lab - did Johnny slip from the roof or was he pushed?

Extracts from this document...


Group 4: Coefficient of Kinetic Friction Scenario Pronounced dead at the scene of the crime, poor Johnny is found lying face up on the dance floor, perhaps slipped from his rooftop to the unforgiving stiff dance floor below. Would such a fall have been possible? Or was young Johnny a victim of foul play? The coefficient of kinetic friction is an experimental value which we calculated and compared to values calculated by independent researchers. The ability of the fall to take place is the net force acting upon Johnny, after the subtraction of the force of friction. ...read more.


The materials we used were rubber, the same sort found in Johnny's shoes, and a wet asphalt shingle, of the same variety found on Johnny's roof. Our experiment gave us a value of 0.3 for the coefficient of kinetic friction between rubber and wet asphalt, one which was consistent with researched results. Calculations These calculations require vector analysis, all of which is based upon the diagram below. Given: * ?=30� * �k= 0.3 * G = 9.8 m/s2 * Mass of Johnny: 56.8kg * F = �k(N) ...read more.


mg sin ?= 278.32 N F = �k(N) F =(0.3)(482.10) F= 141.62 N The calculations show that the friction force, F, was less than the force with which Johnny would have slid off the roof, meaning that it is very likely in his inebriated state Johnny fell by himself, without any foul play. Conclusion If the net force on the body is greater than zero, then the body will slide down the inclined plane with acceleration (g sin ? - fk/m), where fk is the kinetic friction force. Calculations performed to determine the force of impact on the body utilise an initial velocity of 0 Newtons, arrived at through this calculation. ...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 Group 4 Projects 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 Group 4 Projects essays

  1. homeostasis and sports - experiments measuring the effects of exercise on the body

    this was controlled homeostatically by the release of the antidiuretic hormone which controls the reabsorption of water. As for A, he had to loose water so that the concentration of blood plasma was less dilute.Lower concentration of chloride ions was seen in the urine of specimen A since the body

  2. Why is alcohol considered to be a serious problem? As many 33,000 people ...

    However the main problem with alcohol is that it is very addictive and it is estimated that one in 13 people in the UK are dependent on alcohol. Several million drink excessively, and are putting their health at serious risk.

  1. Statistics. This study was conducted to determine whether more than half of FSD ...

    to investigate whether more than half of FSD students want to use Open Library software or not. Because FSD students are a large number for researchers to make survey so we choose the simple random sampling without replacement as our sampling method.

  2. physics lab report group four project

    1 15.0 0.00005 0.065 0.040 0.035 2 14.4 0.00011 0.025 0.040 0.035 3 13.8 0.00017 0.010 0.040 0.035 2. Cross sectional area of soil + water suspension through which current is flowing a. Mountain soil b. Garden Soil 3.

  1. Group 4 project

    * * The length of the arrow shows the strength of the force. * If the arrows are close together there are stronger forces, further apart, weaker forces large positive charge * The strength of the field defined as

  2. Waves and friction

    Shahbaz being closer to the wall. We had instructed Dennis to deviate once he reaches approximately halfway of the pool. After the run we conducted an interview Experiment 3 We then made the swimmers swim one behind another at around 2 meters from the wall.

  1. Group 4 Journal. Our process was an industrial one called Aquaponics. Aquaponics is ...

    Helped with the poster ideas and pasting Asim Datye: 1. Contributed to the project by researching the mechanics of the siphon and conducting the siphon lab 2. Helped with the poster ideas and pasting Baljot Kalsi: 1.

  2. Designing a series of modern fashion accessories design collection with the theme of combining ...

    All designs are presented in a booklet format that could be sent to companies to produce or manufacture. Besides, the booklet can be mass printed by printing companies for publishing, and as a reference for other designers. As I have seen some teenagers having antipathy to all aspects of traditional

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