The Loading of a Cantilever
Aim & Hypothesis
I anticipate that the loading of the cantilever will show a
proportional increase in the depression of the wooden ruler which will
relate directly to the mass which is applied to it. This relationship
is expressed in Hooke's Law, which states that "stress is directly
proportional to strain." I believe that the experiment which I am
going to carrying out involving the cantilever will support this and
will show that that increase in mass on the ruler will result in a
proportional increase in the depression. If this is the case then I
will be able to draw a graph of my results and then use this to work
out an unknown mass by knowing the depression of the beam.
Safety
RISK ASSESSMENT - LEVEL ONE
This experiment does not carry many hazards. Bags and coats will be
moved out of the way to ensure that no one will trip over them. Whilst
loading the beam care will be taken to make sure that the ruler will
not spring back when the masses are placed on by holding it steady
letting go slowly when they are on. The clamp used to fasten the ruler
to the table will be sufficiently tight to hold the ruler with no
danger of it slipping or moving, (yet not so tight that it could
damage the table.)
Variables
Independent Variable: Mass on ruler
Dependent Variable: Depression of ruler
I have kept the distance that the ruler is from the edge of the table
constant, (95cm is over the edge of the table.) I have not altered the
set up of the apparatus throughout the experiment for measuring either
the depression for the known masses or the unknown mass. I have kept
the way that I have measured the depression the same throughout and to
ensure that this is as accurate as possible I have used a protractor
to take the measurements, (see 'method'.)
Diagram
Method
The apparatus was set up as shown above.
cliff and catch the kids who were about to fall off. This meant that if someone was about
(Graph below would be posted using the PowerPoint for students to see before open discussion
values by using buffers set at PH 1, 3, 5, 7, 9. I predict that there
I am also using 6 sets of results, one from each group in my class. I
In my experiment, I will use an overall volume of 50 cm³ of 2moles of
order to do this you really need to try to put together an explanation of
Materials: For the virtual experiment, a computer, Internet, calculator and access to Late Nite Labs were needed.
walking back to their rest place, when all of a sudden there is a gas
chart on a later page. First, though, It probably would be good to tell a
their hands, which was a mistake. That now leaves the question, ?why were there so
0.000 7 63 106 55 74.7 1.245 9 70 135 90 98.3 1.638 11 85 135 70 96.8 1.613 [ IMAGE ] [ IMAGE ] Conclusion = = = =
data on excel. By doing the charts on excel I will be able to plot all
Physics Investigation: The Cantilever. During the experiment, all the safety precautions were considered. All The results are spread over a wide range so a conclusion can be easily reached. drawn.
This graph shows the result that I expect to get, I expect to see a
moved out of the way to ensure that no one will trip over them. Whilst