A lamp consumes 1000 J of electrical energy in 10 s. What is its power?

What is power? Write its SI unit.

Define 1 watt of power.

A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see Figure below). Let us take it that the force acts on the object through the displacement. What is the work done is this case?

A pair of bullocks exerts a force of 140 N in a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?