Effect of Object's Weight on Its Terminal Velocity as it is Falling
Aim
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To investigate how the weight of an object affects its terminal
velocity as it is falling.
Prediction
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I predict that when the weight of a falling object is increased the
terminal velocity will also increase.
I think this because as you increase an objects weight it has a larger
downwards force. In order for the object to travel at a constant
speed, i.e. terminal velocity, another force must match the downward
force. This force is air resistance. So to make air resistance the
same size as the downward force, the object has to be travelling at a
fast enough velocity. A heavier weight will accelerate to a higher
terminal velocity before these two forces are balanced than a lighter
one. This is because air resistance increases when velocity increases
as more air particles collide with the object, which slows the
acceleration of the object down. So the heavier the object the larger
the downward force so more air resistance is needed to balance the two
forces so a higher velocity is needed.
If the weight of the object is doubled I predict that the terminal
velocity will also be doubled. I think this because when the weight of
an object is doubled it has a twice as large downward force. So in
order to balance this doubled force air resistance has to produce the
size force as it, (this is when the object reaches its terminal
velocity). In order for this to do this, the object must double its
speed so air resistance doubles and so matching the downward force.
Falling Masses
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Method
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