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Lexi Halperin
DIMENSIONS:
.61 meters tall
.55 meters length
.5 meters wide
1 vertical loop .18 meters tall
1 horizontal loop .16 meters wide
1 90-degree angle turn
1 180-degree angle turn
2 camel humps
22 support humps
Length of first track .32 meters
Length of 2 camel humps .31 meters
SAFTEY:
In order to protect the passenger’s (marble) safety, we used many thoughtful
ideas. We never make the slopes too steep to where the cart has a chance to dis-attach
from the track. We also use thoughtful ideas such as incorporating an extra camel hump
and an extra turn in order to slow down the over all speed of the coaster to keep it under
control but not making the ride boring. Our stopping mechanism is also valued for the
passenger’s safety. We have a tube it which the diameters is a little larger than the cart so
the cart is let it, but then the diameter slowly become smaller it puts more friction against
the cart until it slowly puts the cart at rest.
EXPLANATION:
On our ride, energy conservation is the main principle that keeps the ride
working. Since we have no access to electricity or other forms of energy generation, we
use gravitational potential energy to keep the ride working. Since the GPE transfers into
KE as the ball moves down the slope and energy is conserved, the marble continues to
move. Acceleration is completely due to gravity in this situation because the ball will
only continue to move if gravitational potential energy is present. Since this energy is
present, gravity acts on the marble causing it to accelerate down the slope at 9.8 m/s^2.
Newton’s laws state that an object at rest will stay at rest and an object in motion
will stay in motion unless an outside force acts upon it. When the object is at rest at the
top of the slope, gravity, an outside force, acts upon it , causing it to move down the
slope. While the ball is moving, the outside force of friction causes it to slow down when
it overcomes the force of gravity. When the slope of the roller coaster is steep, the force
of friction will not overcome gravity, but as the slope becomes flat, friction begins to
overcome gravity.
At several points of the rollercoaster, the apparent weight of the marble changes
however the real weight does not. For example, at the top of the vertical loop, the
apparent weight of the marble is higher because the normal force and the force of gravity
both point in the same direction, as opposed to each facing opposite directions when there
is no centripetal force present.
Point A
Point B
Point C
Point D
Point E
FREE BODY DIAGRAMS
ENERGY CALCULATIONS
Scale Drawing