An 8.10 kilogram box of mass is kept at a height of 0.99 meters above ground level. what is the potential energy of the box? (given g = 9.8 meters/second2). a. 68 joules. b. 79 joules. c. 81 joules. d. 99 joules. e. 1.0 × 102 joules

The answer is B. 79 joules.

To calculate this we will use the formula for potential energy (PE):
PE = m * g * h
where m is mass of an object, g is gravitational acceleration, h is a height at which is the object.

It s given:
m = 8.10 kg
g = 9.8 m/s²
h = 0.99 m

After replacing them in the formula for potential energy:
PE = 8.10 * 9.8 * 0.99 = 78.6 J ≈ 79 J

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