A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is Group of answer choices8 J80 J32 J6 J
Question
A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is
Group of answer choices
8 J
80 J
32 J
6 J
Solution
The potential energy (PE) of an object can be calculated using the formula:
PE = mgh
where: m = mass of the object (in kg) g = acceleration due to gravity (on Earth, it's approximately 9.8 m/s²) h = height above the ground (in m)
Given in the problem: m = 2 kg g = 9.8 m/s² h = 4 m
Substitute these values into the formula:
PE = 2 kg * 9.8 m/s² * 4 m = 78.4 J
So, the potential energy of the ball relative to the ground is 78.4 Joules. However, this option is not available in the given choices. There might be a mistake in the question or the provided choices.
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