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Use 10 m/s for gravity. If there is 46,027 J of energy for a ball at the top of a 883 m high building, what is the mass of the ball?

A. 4.6 kg
B. 46 kg
C. 460.27 kg
D. 4602.7 kg

User Loxaxs
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1 Answer

1 vote

Final answer:

The mass of the ball is calculated using the gravitational potential energy formula GPE = mgh. After substituting the given values (GPE = 46,027 J, g = 10 m/s², h = 883 m), the mass is approximately 5.21 kg, which suggests a typo as the closest option is 4.6 kg (Option A).

Step-by-step explanation:

To find out the mass of the ball, we use the formula for gravitational potential energy (GPE), which is GPE = mgh, where:

  • m is the mass,
  • g is the acceleration due to gravity, and
  • h is the height.

The problem gives us the GPE as 46,027 J, the height (h) as 883 m, and the acceleration due to gravity (g) as 10 m/s². To find the mass (m), we rearrange the formula to m = GPE / (gh), and plug in our known values:

m = 46,027 J / (10 m/s² * 883 m) = 46,027 J / 8,830 m²/s² = 5.21 kg (approximately)

However, since none of the answer choices exactly match, it seems like there may have been rounding in the question or a typo. If we round to the nearest option, we get 4.6 kg, which is option A.

User MichaelP
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