How much time is needed for a 15,000 W engine to do 1,800,000 J of work? (Power: P = W/t) 0.008 s 8 s 120 s 1,785,000 s

Question

asked Jan 5, 2019 88.2k views

2 Answers

Placplacboom · Answer 1 · 2019-01-12T02:14:23+0000

By definition, the power is given by:

P = (W)/(t)

By definition, the power is given by:
Where,
W: Work done
t: time
Clearing the time we have:

t = (W)/(P)

Substituting values we have:

t = (1800000)/(15000)

Making the corresponding calculations we have:

t = 120s

Answer:
is needed for a 15,000 W engine to do 1,800,000 J of work about:

t = 120s