Evan Renjith's answer to Vidhya Lakshimi's Primary 6 Science Singapore question.
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Answer: 2
1 is false because the mass does affect the braking distance.
2 is true because , through the graph, we can infer that when the speed of the car is higher, the braking distance is higher.
3 is false. Kinetic energy is speed of an object. When the kinetic energy is lower, the braking distance is lesser.
4 is false. The braking distance converts kinetic energy into heat and sound energy. It is not the potential energy that is converted.
Thus, the answer is 2.
1 is false because the mass does affect the braking distance.
2 is true because , through the graph, we can infer that when the speed of the car is higher, the braking distance is higher.
3 is false. Kinetic energy is speed of an object. When the kinetic energy is lower, the braking distance is lesser.
4 is false. The braking distance converts kinetic energy into heat and sound energy. It is not the potential energy that is converted.
Thus, the answer is 2.
Date Posted:
4 years ago
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