10. As your car falls down each hill, _________ causes it to accelerate.
*
2 points
kinetic energy
resistance
gravity
friction
9 answers
gravity
11. What kind of energy is gained when your roller coaster goes uphill?
*
2 points
kinetic energy
potential energy
mechanical energy
dissipated energy
*
2 points
kinetic energy
potential energy
mechanical energy
dissipated energy
potential energy
12. Based on your observations, what is the relationship between potential and kinetic energy? Choose 2 correct statements.
*
4 points
Kinetic energy is stored until potential energy causes motion.
Potential energy is stored until the top of hill when the coaster begins its descent.
Potential energy converts to kinetic energy as the coaster tops the hill.
The mechanical energy of the track is all that moves the coaster.
*
4 points
Kinetic energy is stored until potential energy causes motion.
Potential energy is stored until the top of hill when the coaster begins its descent.
Potential energy converts to kinetic energy as the coaster tops the hill.
The mechanical energy of the track is all that moves the coaster.
Potential energy converts to kinetic energy as the coaster tops the hill.
Kinetic energy is stored until potential energy causes motion.
Kinetic energy is stored until potential energy causes motion.
13. If friction was completely removed from the track, what affect would this have on the roller coaster ride?
*
2 points
Without friction, the roller coaster ride would last forever!
The coaster would eventually stop because the coaster would still lose energy.
The coaster would use hills and flat sections to stop instead
*
2 points
Without friction, the roller coaster ride would last forever!
The coaster would eventually stop because the coaster would still lose energy.
The coaster would use hills and flat sections to stop instead
Without friction, the coaster would use hills and flat sections to stop instead.
14. Why does the number of carts matter when designing a roller coaster track ? (Hint: PE = mass x gravity x height and KE = ½ mass x velocity ^2) Choose 2 correct statements.
*
4 points
Adding carts increases the mass and decreases the total energy in the system.
Adding carts increases the mass and increases the total energy in the system.
Removing carts increases the mass and decreases the total energy in the system.
Removing carts decreases the mass and decreases the total energy in the system.
*
4 points
Adding carts increases the mass and decreases the total energy in the system.
Adding carts increases the mass and increases the total energy in the system.
Removing carts increases the mass and decreases the total energy in the system.
Removing carts decreases the mass and decreases the total energy in the system.
Adding carts increases the mass and increases the total energy in the system.
Removing carts decreases the mass and decreases the total energy in the system.
Removing carts decreases the mass and decreases the total energy in the system.