Investigating a Factor that Affects the Rate of Decent of a Parachute
Aim- To investigate one factor that affects the rate of decent of a
parachute.
Plan
There are many factors that affect the rate of decent of a parachute,
some of these are: The weight of the object on the end of a parachute,
the weight of the parachute, the length of the strings on the end of
the parachute, the surface area of the parachute, and the shape of the
parachute. As we were only instructed to investigate one of the
factors listed above we chose to find out how the surface area of a
parachute affects it's fall.This is how we are going to carry out our
experiment:
Firstly we will cut out 8 differently sized parachutes from a black
binliner. The parachutes will be sized 25cm (5cm 5cm), 100cm (10cm
10cm), 225cm (15cm 15cm), 400cm (20cm 20cm), 625cm (25cm 25cm), 900cm
(30cm 30cm), 1225cm (35cm 35cm), 1600cm (40cm 40cm). These sizes are
evenly spaced because when i come to plot my results on a graph they
will be alot easier to read and hopefully a pattern will appear.
Secondly we will cut out some lengths of string. 32 lengths of string
will be needed in all (one for each corner of each parachute). All of
the pieces of string should be the same length (40cm) as any variation
in length could affect the results because longer strings would make
the plasticine touch the ground before shorter ones, and if the
strings on one parachute were all different the parachute would be
pulled down in a wierd shape which may also affect the outcome. The
strings should be attached at the same position of each corner on each
parachute to prevent the parachute be...
... middle of paper ...
...k we got
these anomalous results because of human error, are reaction times
could have been slowed when timing the results or the parachutes could
have been faulty or measured slightly wrongly. There are lots of
reasons for human error.
If I did the experiment again I could improve it by dropping each
parachute more than 4 times so that the results were more accurate. I
could use a better material than black bags to make the parachutes out
of because then they wouldn't ruccle when sellotape was put on them or
rip when you are trying to cut them out.
I could extend my investigation by carrying on an using bigger surface
areas. If I did do this I think that eventually the line on the graph
would straighten off because eventually the parachutes wouldn't be
able to reach the point of no resultant force any quicker.
on the y. If my prediction is right I should be able to draw a
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