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Franckysnow · Answer 1 · 2018-05-23T06:30:34+0000

20-kg barrel has 980J of potential energy when it is in the truck whose floor is 5.0 m above the ground

Potential energy is given as , P.E = Mgh
where, M = mass of the object
g = gravity = 9.8m/
sec^(2)

h=height of the object from ground

Thus, P.E = 20-kg × 5.0 m × 9.8m/
sec^(2)

= 980J

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