Final answer:
The potential energy of a kid weighing 300 N at the top of a 3m high incline is calculated as 900 Joules using the formula PE = mgh, but this correct value is not listed among the provided answer options.
Step-by-step explanation:
The potential energy (PE) of a kid sitting at the top of an inclined plane that is 3 meters high can be calculated using the formula PE = mgh, where m is the mass of the kid (or the force due to gravity on the kid divided by the acceleration due to gravity, g), g is the acceleration due to gravity (approximately 10 m/s² if we round for simplicity), and h is the height above the ground. Assuming the weight of the child is similar to the example in the practice problem, which is 300 Newtons (N), we can substitute the values into the formula: PE = 300 N * 10 m/s² * 3 m. This calculation would give us a potential energy of 900 J (Joules).
However, the options provided for the potential energy in the question do not contain 900 J. It seems like there might've been a mistake in the question or calculation. The correct value is not listed among the options A) 0 Joules, B) 9.8 Joules, C) 29.4 Joules, or D) 88.2 Joules. The closest correct answer based on the calculations would be a value not listed, which is 900 Joules. So, the correct answer to the student's question is not provided in the options.