Lee Jin Yong Zach's answer to Zi qi's Secondary 1 Maths Singapore question.
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For a) the answer should A. As the question states that the car possible ONLY gravitational energy. So the car should not have kinetic energy, which also means it should not be moving. At all other point, the cars will be moving.
For b) the answer should be C. To identify the point where the car is the fastest, you need to be able to identify where the gravitational potential energy is the lowest. At that point, most amount of energy would be converted to kinetic energy, which results in the greatest speed.
:)
For b) the answer should be C. To identify the point where the car is the fastest, you need to be able to identify where the gravitational potential energy is the lowest. At that point, most amount of energy would be converted to kinetic energy, which results in the greatest speed.
:)
Date Posted:
4 years ago
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