Factors Determining the Stopping Distance of Rollers Down a Ramp
Theory-
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When the roller is rolling down the slope then potential energy is
converted to kinetic energy that converts into heat energy.
MGH = ½MVsquared
The loss of kinetic energy on the carpet is ….
½MVsquared = braking force x braking distance
therefore….
½Mvsquared = F x
so MGH = F x
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If m, g and f are constant then….
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However if G is constant then….
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So….
This relation ship can be tested for a fixed angle, roller mass and
fixed carpet.
Predictions-
In this experiment, before it was conducted and results were obtained
, I predicted that for all the rollers, that the stopping distance
would be directly proportional to the distance up the ramp. This
prediction can be tested by plotting a graph of the results.
Variables and Constants in the Experiment
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Variables
Constants
Distance up ramp
Type of carpet
Distance along carpet
Angle 'G'
Mass of roller
Type of metal
To maintain a fair test these are the procedures I had -
· 1 fixed angle
· 1 set of rollers
· to make sure that the ruler was at the bottom of the ramp
· A fixed interval (3,6,9ect….)
To find out if my predictions were correct, I conducted an experiment.
It was set up as follows;
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[IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE] The
Experiment
Aim -
to investigate the factors, which determine the stopping distance of
rollers down a ramp
Apparatus-
1. 3 rollers, all made from steel
2. I ramp
3. 2 meter rules
4. a stretch of carpet
5. a set square - to measure up to the half way point on the roller
Method -
1. select a type of roller, and do not change it
· I will take all of my results on the same day with the same
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