"20 J" is the "Potential Energy" of "vase" on the table.
Explanation:
The body possess some energy according to the position of the object that is the when an object is placed at a height it stores some energy it is called "Potential Energy".
Formula used to calculate the "Potential Energy" is [tex]m\times g \times h[/tex]
Where, "m" is mass of vase is given that 2 kg, "g" is acceleration due to gravity is [tex]10 m/s^2[/tex] and "h" is height of the object where it placed is 1 m.
Substitute the given values in the formula,
Potential energy of the vase = [tex]2\times10\times1[/tex]
Potential energy of the vase = 20 J