Question

potential energy (pe): pe = mgh, m = mass (in kg), g = 9.8 n/kg, h = height (in m). what is the gravitational potential energy of a 55 kg box that is 8.0 m above the ground? 1 point. which of the following processes requires the most work? a person holds a 1 kg weight still with out - stretched arm. a person lifts a 1 kg weight 1 m off the floor. a 10 kg ball is rolled across the floor at a constant speed for a distance of 10 m. a 10 kg weight rests on a table. 3400 j, 4312 j, 539 j, 5564 j

Explanation:

Step1: Identify given values

$m = 55$ kg, $g=9.8$ N/kg, $h = 8.0$ m

Step2: Use potential - energy formula

$PE=mgh$
Substitute values: $PE = 55\times9.8\times8.0$
$PE=55\times78.4$
$PE = 4312$ J

Answer:

4312 J