The work done against gravity is 100 J
Explanation:
The work done against gravity in order to lift an object is equal to the change in gravitational potential energy of the object:
[tex]W=mg\Delta h[/tex]
where
m is the mass of the object
g is the acceleration of gravity
[tex]\Delta h[/tex] is the change in height of the object
For the object in this problem, we have:
m = 5 kg
[tex]g=10 m/s^2[/tex]
[tex]\Delta h = 2 m[/tex]
Substituting into the equation,
[tex]W=(5)(10)(2)=100 J[/tex]
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