Question

How much work does a 30W engine do if it operates for 40 seconds

Answer 1

Given that :

Power (P) = 30 W ,

time (t) = 40 s,

Work = ?

we know that, power is defined as rate of doing work

Power = Work ÷ time

=> Work = Power × time

= 30 × 40

W = 1200 J