Solution:

Here, distance displaced (d) = 20 m,

Force applied to displace the box (F) = 20 N,

The time that is taken for the box to be displaced (t) = 2 sec,

We have, Work done (W) = force applied (F) × distance moved by the force (d)

= 20 × 20

= 400 Joules

Again, power at which the box was displaced (P) = (work done) / (time taken)

= \(\frac{W}{d}\)

= \(\frac{400}{2}\)

= 200 Watt

Hence, the work done is 400 Joules and the power is 200 Watt.