If the work done

Let the distance travelled be x by the body and y be the work done by the force

Given: y ∝ x

To equate the proportional, we need a constant.
Hence, y = k x
where k is a constant

Here, it is given 5

Hence,

y = 5 x

According to question,

(i) When x = 2 units then y = 5 x 2 = 10 units

(ii) When x = 0 unit then y = 5 x 0 = 0 unit