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AAMC CBT 5 question #38
The premise of the passage is that a child on a sled slides down a hill on a taboggon from point A (at the top of the hill) to point B (at the bottom of the hill). Between points A and B, the sled and rider are opposed by a constant 50N frictional force.
Question: Which of the following best describes the energy conversion that is taking place when the toboggan is sliding from point A to point B?
A) Kinetic to potential and thermal
B) Kinetic and potential to thermal
C) Potential to kinetic and thermal
D) Potential and kinetic to thermal
A and B are immediately crossed off, so it's between C and D.
I chose D, but the correct answer is C...I am kind of thrown off by the wording in this one. I get that the energy conversion is Potential to kinetic, but isn't the thermal energy a result of the kinetic energy?
I thought the answer should be Potential to Kinetic to thermal. How does energy go directly from potential to thermal? Maybe it's the wording of the problem, or maybe I'm just not quite seeing it...but can someone help me out on this and elaborate on why the answer is c?
Cheers
The premise of the passage is that a child on a sled slides down a hill on a taboggon from point A (at the top of the hill) to point B (at the bottom of the hill). Between points A and B, the sled and rider are opposed by a constant 50N frictional force.
Question: Which of the following best describes the energy conversion that is taking place when the toboggan is sliding from point A to point B?
A) Kinetic to potential and thermal
B) Kinetic and potential to thermal
C) Potential to kinetic and thermal
D) Potential and kinetic to thermal
A and B are immediately crossed off, so it's between C and D.
I chose D, but the correct answer is C...I am kind of thrown off by the wording in this one. I get that the energy conversion is Potential to kinetic, but isn't the thermal energy a result of the kinetic energy?
I thought the answer should be Potential to Kinetic to thermal. How does energy go directly from potential to thermal? Maybe it's the wording of the problem, or maybe I'm just not quite seeing it...but can someone help me out on this and elaborate on why the answer is c?
Cheers
