Download SCi.roller-coaster-project2

Point A
Distance
Time
Speed
PE
KE
Mass of Ball 1
Avg. Time of Ball 1
Gravity
Height
22,226.4 Joules
108.38 Joules
12 g
4.25 sec.
9.8
498 cm
0 cm PE = mhg
0 sec
0 cm/sec m- 12 g
h- 189 cm
g- 9.8
The law of conservation of energy is that energy cannot
be created or destroyed, but it can be transferred or
transformed from one form to another.
Point B
Distance
Time
Speed
PE
KE
Mass of Ball 1
Avg. Time of Ball 1
Gravity
Height
143 cm
.29 sec mass- 12g
493.10 cm/sec h- 163 cm
g- 9.8
19,168.8 Joules
108.38 Joules
12 g
4.25 sec.
9.8
163 g
Point C
Distance
Time
Speed
PE
KE
Mass of Ball 1
Avg. Time of Ball 1
Gravity
Height
13,641.6 Joules
108.30 Joules
12 g
4.25 sec.
9.8
116 cm
KE & PE Energy
243 cm
.84 sec mass- 12g
289.29 cm/sec h- 116 cm
g- 9.8
The reason PE and KE would change is because potential
energy is before the object actually moves, it has the ability to
move, but might not. Kinetic energy means the amount of energy
the object has while moving means how much energy is it using to
move right now. When the PE increases, the KE decreases and
vice versa. If the ball can only move so fast down a ramp, then the
rest of the energy that it isn’t using is PE while the KE is found out
using the mathematic expression KE = ½ m X v2 . The formula for
finding PE is PE = mhg (mass x height x gravity) to see how much
energy the object has so it could move if forced to. When the object
rolls down a ramp, it’s PE converts to KE and KE to PE when it
stops. It changes as the ball stops and goes.
The way that the Law of Conservation of energy applies here
because the law states that energy cannot be created or destroyed
but it can be transferred or transformed from one object to another.
So when the potential energy in the ball changes to kinetic energy
it does obey the law. It is possible and shows how the energy can
change types.
Why speed changes …
The reason the speed of the Small Ball Bearing would change because of the slope of the hill, the height of
the hill, the angle of the track, and the friction between the track and the ball. If the hill that the ball is rolling down
is steep, than later on in the roller coaster, the ball would roll faster, causing more friction between the ball and track
in order for the ball to stay on the track. The gravity would also pull on the ball to slow it’s speed and if there was a
hill leading up to a loop, the ball would gain momentum to travel through the loop without falling out of it.
Point A
Distance
Time
Speed
PE
KE
Mass of Ball 1
Avg. Time of Ball 1
Gravity
Height
22,226.4 Joules
108.38 Joules
12 g
4.25 sec.
9.8
498 cm
0 cm PE = mhg
0 sec
0 cm/sec m- 12 g
h- 189 cm
g- 9.8
Point B
Distance
Time
Speed
PE
KE
Mass of Ball 1
Avg. Time of Ball 1
Gravity
Height
19,168.8 Joules
108.38 Joules
12 g
4.25 sec.
9.8
163 g
143 cm
.29 sec mass- 12g
493.10 cm/sec h- 163 cm
g- 9.8
Point C
Distance
Time
Speed
PE
KE
Mass of Ball 1
Avg. Time of Ball 1
Gravity
Height
13,641.6 Joules
108.30 Joules
12 g
4.25 sec.
9.8
116 cm
243 cm
.84 sec mass- 12g
289.29 cm/sec h- 116 cm
g- 9.8
Forces/Motion Explanations …
At spot A on the roller coaster, at the top where the ball has not started movement yet, the
force is balanced and equal where gravity has not started pulling the ball closer to the ground
because there is no movement or motion yet. It is balanced because the gravity pushing up and
pulling down are completely equal because the ball is not moving yet.
At spot B on the roller coaster, at the top of the first, (and only) hill, where the ball has
moved to get there but was momentarily paused, is balanced not restarted movement yet, the
force is balanced and equal where gravity has not started pulling the ball closer to the ground again
because there is no movement or motion yet. It is balanced because the gravity pushing up and
pulling down are completely equal because the ball is not moving yet.
At spot C on the roller coaster, at the beginning of the green bottle, the ball has been
traveling downhill to reach the spot so it gain momentum to continue going downward to make it
through the loop. The ball has unbalanced force and motion because it is moving and the gravity is
‘winning’ because the ball is traveling down towards the ground. The force is unbalanced and
unequal where gravity has started pulling the ball closer to the ground again because there is
movement.
489 cm
100 cm
The ball would keep rolling for the rest of
the ramp into the green bottle, swirl down
onto more downhill track to gain enough
momentum to make it through the loop,
and during this the ball’s energy is
unbalanced because it is moving and
gravity is pulling it towards the ground not
even with the roller coaster if it was a flat
track. Gaining speed through the rest of
the coaster to make it up the loop with all
116 cm
downhill track.
C
51 cm
Start of the track
A
B
189 cm
163 cm
147 cm
The ball would stop
rolling for one
millisecond and be
exactly half PE and half
KE because it is
balanced energy and
motion even though it
paused in its motion for
that nanosecond.
Gains speed once it
starts going down the
other side of the hill.
40 cm
The ball would roll down
the green bottle gaining
speed but being
unbalanced motion, and
still has more KE than
PE because it is moving
and is using the energy
to continue downhill
while gravity forces it to
keep going downhill.
92 cm
The ball would roll down
the track gaining speed
but being unbalanced
motion, and still has more
KE than PE because it is
moving and is using the
energy to continue
downhill while gravity
forces it to keep going
downhill. It gets to the loop
and at one point at the
top, it momentarily stops
and is perfectly balanced
with KE and PE
The ball would
continue rolling
and now be more
KE than PE
because it needs
the speed to
make it up the
part of the hill that
inclines. Gaining
speed as it goes
down, but uses
some of that
speed to make it
up the hill.
The ball would roll down
the track going from all
PE to some PE and
some KE, gaining
momentum with
balanced energy
because it hasn’t started
moving yet. It would be
gaining speed as it
descends into the track.
15 cm
Finish