Name: Lee Arthur Date:
Student Exploration: Roller Coaster Physics
Vocabulary: friction, gravitational potential energy, kinetic energy, momentum, velocity
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Sally
gets onto the roller coaster car, a bit nervous already. Her heart beats faster
as the car slowly goes up the first long, steep hill.
1. What happens at the beginning of every roller coaster ride?
You gain momentum.
2. Does the roller coaster ever get higher than the first hill? No
Explain. It would not have enough momentum to get higher than
the first hill.
Gizmo Warm-up
The Roller Coaster Physics Gizmo™ models a roller
coaster with a toy car on a track that leads to an egg.You
can change the track or the car. For the first experiment, use
the default settings (Hill 1 = 70 cm, Hill 2 = 0 cm, Hill 3 =
0 cm, 35-g car).
A. Press Play ( ) to roll the 35-gram toy car down
the track. Does the car break the egg? No
1. Click Reset ( ). Set Hill 1 to 80 cm, and click Play. Does the car break the egg? Yes
2. Click Reset. Lower Hill 1 back to 70 cm and select the 50-gram toy car. Click Play. Doesthe 50-
gram car break the egg? Yes.
3. What factors seem to determine whether the car will break the egg?
The height of the hill and the weight of the care.
Activity A: Get the Gizmo ready:
Roller coaster ● Click Reset.
speed ● Select the 35-g toy car.
, Question: What factors determine the velocity of a roller coaster?
1. Observe: Set Hill 1 to 100 cm, Hill 2 to 0 cm, and Hill 3 to 0 cm. Be sure the Coefficient offriction
is set to 0.00. (This means that there is no friction, or resistance to motion.)
A. Click Play. What is the final speed of the toy car? 442.9 cm/s
B. Try the other cars. Does the mass of the car affect its final speed? No, they are thesame.
2. Collect data: Find the final speed of a toy car in each situation. Leave the last column blank.
Total Height
Hill 1 Hill 2 Hill 3 Final speed
Loss
40 cm 0 cm 0 cm 280.1 cm/s 40 cm
40 cm 30 cm 0 cm 280.1 cm/s 40 cm
60 cm 50 cm 20 cm 280.1 cm/s 40 cm
60 cm 0 cm 0 cm 343.1 cm/s 60 cm
60 cm 45 cm 0 cm 343.1 cm/s 60 cm
90 cm 75 cm 30 cm 343.1 cm/s 60 cm
3. Analyze: Look at the data carefully. Notice that it is organized into two sets of three trials.
A. What did each set of trials have in common? They all have the same final speeds.
B. Did hill 2 have any effect on the final speed? No.
C. Label the last column of the table Total height lost. Fill in this column by subtractingthe
height of hill 3 from the height of hill 1.
D. What do you notice about the Total height lost in each set of trials?
They are all the same.
4. Draw conclusions: When there is no friction, what is the only factor that affects the finalspeed
of a roller coaster? Height.
What factors do not affect the final speed of a roller coaster?
Mass
Student Exploration: Roller Coaster Physics
Vocabulary: friction, gravitational potential energy, kinetic energy, momentum, velocity
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Sally
gets onto the roller coaster car, a bit nervous already. Her heart beats faster
as the car slowly goes up the first long, steep hill.
1. What happens at the beginning of every roller coaster ride?
You gain momentum.
2. Does the roller coaster ever get higher than the first hill? No
Explain. It would not have enough momentum to get higher than
the first hill.
Gizmo Warm-up
The Roller Coaster Physics Gizmo™ models a roller
coaster with a toy car on a track that leads to an egg.You
can change the track or the car. For the first experiment, use
the default settings (Hill 1 = 70 cm, Hill 2 = 0 cm, Hill 3 =
0 cm, 35-g car).
A. Press Play ( ) to roll the 35-gram toy car down
the track. Does the car break the egg? No
1. Click Reset ( ). Set Hill 1 to 80 cm, and click Play. Does the car break the egg? Yes
2. Click Reset. Lower Hill 1 back to 70 cm and select the 50-gram toy car. Click Play. Doesthe 50-
gram car break the egg? Yes.
3. What factors seem to determine whether the car will break the egg?
The height of the hill and the weight of the care.
Activity A: Get the Gizmo ready:
Roller coaster ● Click Reset.
speed ● Select the 35-g toy car.
, Question: What factors determine the velocity of a roller coaster?
1. Observe: Set Hill 1 to 100 cm, Hill 2 to 0 cm, and Hill 3 to 0 cm. Be sure the Coefficient offriction
is set to 0.00. (This means that there is no friction, or resistance to motion.)
A. Click Play. What is the final speed of the toy car? 442.9 cm/s
B. Try the other cars. Does the mass of the car affect its final speed? No, they are thesame.
2. Collect data: Find the final speed of a toy car in each situation. Leave the last column blank.
Total Height
Hill 1 Hill 2 Hill 3 Final speed
Loss
40 cm 0 cm 0 cm 280.1 cm/s 40 cm
40 cm 30 cm 0 cm 280.1 cm/s 40 cm
60 cm 50 cm 20 cm 280.1 cm/s 40 cm
60 cm 0 cm 0 cm 343.1 cm/s 60 cm
60 cm 45 cm 0 cm 343.1 cm/s 60 cm
90 cm 75 cm 30 cm 343.1 cm/s 60 cm
3. Analyze: Look at the data carefully. Notice that it is organized into two sets of three trials.
A. What did each set of trials have in common? They all have the same final speeds.
B. Did hill 2 have any effect on the final speed? No.
C. Label the last column of the table Total height lost. Fill in this column by subtractingthe
height of hill 3 from the height of hill 1.
D. What do you notice about the Total height lost in each set of trials?
They are all the same.
4. Draw conclusions: When there is no friction, what is the only factor that affects the finalspeed
of a roller coaster? Height.
What factors do not affect the final speed of a roller coaster?
Mass
