Question

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

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

Answer 1

Answer:

question 1

We know ,

P = W/T

Time = 10 s

Work done = Energy consumed by the lamp = 1000 J

Power = 1000/10

= 100 Js-1 

=100 W

question 2

AS WE KNOW

Work done = Force × Displacement

W = F × S

Where,

F = 7 N

S = 8 m

So, work done,

W = 7 × 8

W = 56 Nm

W = 56 J

FORMALS USED

P = W/T

W = F × S

hope it helps you