Answer:
200 J
Explanation:
By the law of conservation of energy, the kinetic energy gained by the object during the fall is equal to the loss of gravitational potential energy:
[tex]\Delta K= -\Delta U[/tex]
The loss of gravitational potential energy of the object over a distance of 10 m is given by:
[tex]\Delta U=-(mg)(h)[/tex]
where
(mg) = 20 N is the weight of the object
h = 10 m is the loss in height
Substituting, we find
[tex]\Delta U = -(20 N)(10 m)=-200 J[/tex]
So, the kinetic energy gained by the object is
[tex]\Delta K=-(-200 J)=200 J[/tex]
