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The waitress lifts an apple pie 5.0 m from the kitchen on the ground floor to the dining room on the second floor. If the pie weighs 0.30 kg, what is the gravitational potential energy gained by the pie?

A) 1.47 J
B) 14.7 J
C) 147 J
D) 1,470 J

Answer :

Final answer:

To determine the gravitational potential energy gained by the apple pie, multiply its mass (0.30 kg) by gravity (9.8 m/s²) and the height it was lifted (5.0 m), resulting in 14.7 J, which is answer B.

Explanation:

To calculate the gravitational potential energy (GPE) gained by the pie as it is lifted to the second floor, the formula GPE = mgh is used, where:

  • m is the mass of the object in kilograms,
  • g is the acceleration due to gravity (approximated as 9.8 m/s²),
  • h is the height in meters the object is lifted.

Given:

  • m = 0.30 kg,
  • g = 9.8 m/s²,
  • h = 5.0 m,

The calculation is:

GPE = mgh = (0.30 kg) × (9.8 m/s²) × (5.0 m) = 14.7 J.

Therefore, the correct answer is B) 14.7 J.

Learn more about Gravitational Potential Energy here:

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