Jump and jump
Measurement of marketing, force and jump height
Measure
This experiment aims that you should read and
interpret graphs and comparing measurements from several
various apparatuses.
Experiment
A force platform can be used to determine the force
of a spring and a video camera can be used for
To determine the relationship between the starting
point, the beginning of the move and the height of the jump.
A student jumps from the force plate and up
(possibly over a small obstacle) with two different
leg positions as a starting point (nearly upright
and down to the knees). Bouncing video filmed - remember that
place a scale in the vicinity. Data from the force
plate is transferred electronically to LoggerPro (set
for example. clock 5s) while video footage
transferred to Video Point. (Instructions for use of Video Point
at the back).
Be aware:
- The force platform "tolerance" must be
set to -200 / +850 N
-That the camera is held steady (use a tripod) and
perpendicular to the subject and scale
-The camera and LoggerPro started at the same time
(the film is very "heavy")
Questions
The following questions must be answered after the
experiment by looking at the graphs of position, speed and
acceleration from Video Point, and the graph of the
power of LoggerPro:
● What's on the axes of the graphs? Explain what the
graphs show.
● When set subjects of?
● When she is more than up?
● What happens when she lands again?
● Is there a difference between the graphs of the
two jumps with different leg positions as
Based?
● Is there a connection between hoppets height and
power from the starting point?
● What happens to the kinetic and potential energy
during the jump?
Body and muscles - NV progress in 1s 2006 Page 3 of
8Muskelstyrke
Measuring the tensile force as a function of the
angle
Measure
This experiment aims to I draw a hypothesis and test
the truth value
experimentally .... little as POE attempt ......
Hypothesis
In the experimentally investigate the force one
subjects can draw with when the arm is placed in
different positions. What relationship do you expect
between arm position (angle) and traction? This
is your hypothesis.
The word hypothesis used a
scientific "rule" not proven
while provisionally assumed as
working basis.
Experiment
Kraft platform can be used to determine armbøjermusklens
(biceps) strength at different
angles. A person lies on his stomach on a table and
pulls at different angles. The angles 30 °, 60 °,
90 °, 120 ° and 150 ° can be easily constructed with
a big sign triangle from mathematics room. Data
transferred electronically to LoggerPro (set
example. clockwise on 200s).
Be aware:
- The force platform "tolerance" must be
set to -200 / +850 N
- The person's forearm should be horizontal
- The person must be in the same position every time
- The person is not using the muscle
gaining secrets review of the back,
especially at the angle of 150 °
Questions
● How voted your hypothesis with the observed?
● Can you improve your first hypothesis?
● Can we be sure that it is only one factor, we vary
between studies?
Finger Forces
Measurement of muscle strength in right and left
hand
Measure
This experiment has (as experiment with muscle
strength) as a goal that you set up a hypothesis and
test the truth value experimentally .... little as
POE attempt ...
The experiment
Hånddynamometeret connected to a computer with
program LoggerPro (set the time to 60 seconds) and
all
in the group of terminals of a maximum dynamometer
approx. 2 seconds, with first right then left
hand. Determine the correlation between data from
the right
hands (x-axis) and left hand (y-axis) either
using calculator or computer.
Questions
● Is there a linear relationship?
● How would you interpret the data?
● Describe in your own words what you have shown.
Now try to let all members of the group, press
maximum with the right thumb. The new data loaded
into
a new column (on the calculator: List 3) and
the connection between the first pillar and the
third column is determined.
Questions
● Is there a linear relationship?
● How would you interpret the data?
● Describe in your own words what you have shown.
The body's resting effect
Measurement of the body's energy metabolism
Measure
This experiment aims that you must combine models of
heating and evaporation of
measurements on the human body.
The body "using" energy
There must be energy, to keep your body in time -
even if you do not you move. I must still
breathing, the heart must beat and message to and
from the brain via nerves, also requires energy. These
activities is called the body's basic functions. In
addition, your bodies kept warm, and they give
Also energy to the surroundings. All of the
functions that require energy. In biology, we speak
collected on these processes as the body's resting
metabolic rate - in physics we call the body's resting effect.
By placing a sedentary (lightly dressed or
(preferably) completely naked!) Person in an insulated box can
person's resting efficiency is determined by the
heat and water vapor, which are donated to
environment (air in the box), is an expression of
energy metabolism in the resting body. The person
deliver its energy by conduction, convection, heat
radiation and evaporation, and your
task now is to determine how much energy your
subject's body converts.
Standard resting mode
The subject should be the measurements therefore be
at rest, and then we shall have variable control (we must
compare with tables and other subjects) must rest
state of a human being first
defined. In many places, seen a so-called standard
resting state as a subject must be located
in during a measurement, defined as follows:
• The measurement must be performed in the morning.
• The subject must be lying in a horizontal position
and be totally relaxed and have been
for at least 1 hour. The measurement must be carried
out in this position.
• The person must not have consumed food or drink
for at least 3 hours.
• The person must be in the "comfortable room
temperature" (thermal comfort mode). A
person without clothes, this will be at approx. 29 °
C and lower, of course, of a clothed person.
The energy conversion that takes place in this
relaxed state, we will hereinafter called basal energy expenditure (resting)
effect.
● Why do you call an energy circulation in the body
for metabolism?
I can your measurements do not work in standard-rest
mode, but you can bring your
experimental conditions for calibration
disse.Kassens
A bulb positioned in a closed box will be
the temperature in the box to rise to a certain
level due to the heat lamp
In the same way, a person located in the same box
have the temperature up to a (second) level
corresponding to the person's heat.
The increase in temperature in the compartment will,
of course, depend on the power supplied to the box. If one
for example. double effect, will also double the
temperature rise. In other words,
proportionality between the effect and the greatest
temperature difference between the start - and end temperature.
When we graph the effect on the x-axis and the
temperature difference on the y-axis, we say that we have
performed a calibration curve. Henceforth, this
curve, namely, could be used to determine the effect
at any temperature difference.
● Try to give a reason for the temperature in the
box not only continues to rise, but when
a constant level after a while.
Below is a calibration curve for the box I have to
work with.
The best straight line is given by: y = 0.0528 x +
0.0735
Think that I should do this calibration.
● How would examine the relationship between
temperature rise in the box and the time when
a bulb placed in the box?
● Draw a sketch of your proposal to study and
describe in words how I would do it. What
variables would you measure at?
● How warm the air in the box be before you stop
your measurements?
Now look at calibration.
● Which bulbs are used for calibration? How do you
see it?
● Can you out from the basket to see how many
measurements are made?
Measurement: The body's rest power - heat
You must measure how much heat a subject (choose one
group) produces a state
near the rest. That is, to determine the temperature
rise in the box, with a person in it.
First, consider the following:
● How long the person can be in the box before the
first effects of hypoxia starts?
● How should the temperature in the box measured?
When the final temperature Tmax is read, you must exercises which heat effect, the person is delivered by
using the calibration curve.
Measurement: The body's rest effect - evaporation
In order to determine the evaporation energy, the
relative humidity (RH) in the box measured by
start and end of the experiment. Using the table on
page 187 in Orbit C to the mass of evaporated water Δm
determined.
Carton volume is 0.5852 m3
minus the volume of the person.
● Consider how the person's volume can be determined
- and determine it!
● Calculate how much water the person has applied to
the box interior through evaporation (think of how we
Oct. certain mass of water vapor in the classroom),
and decide afterwards using the data book
(Water evaporation heat at different temperatures)
the energy that person's body has lost
by evaporating water from its surface - and finally
determine the person's evaporation effects.
Finally, can you calculate the person's total
resting effect by adding
evaporation power (the energy body loses by
increasing the humidity in termokassen)
and heating power (the energy body loses by
increasing the room temperature in termokassen)
Rain Task to the body's resting effect: What do the
results?
● Your found resting effect can be compared with several
different ways to calculate it. Use
Example 1 page 166-167 in Orbit C to calculate
resting effect of your subject and
compare results with your measured value.
Furthermore, hvileeffektten found from a table using
the age, sex and mass criteria. Here
a selection of such a table. The result comes out in
W, where m is measured in kg.
Calculate hvileeffektten to the subject of this
context and compare with your
measured value.
It is important to point out that all these
"formulas" were made by measuring many people, and so
forming an average. Moreover, in other tests used in
other formulas. The reason for this
"Disagreement" is that different variables
have an impact on performance - for example, sex and weight as the
important, but also the climate one is adapted and
also diet and time was previously
ingested it has influence.
● Why is it "smart" if the body's resting
effect can adapt respectively a cold and a warm
climate?
● How can it be that a person who has just eaten a
meal, have a higher resting effect?
● Try to state the reasons for the measured value
may be different from the theoretically calculated.
No comments:
Post a Comment