Question

While rowing across the lake during a race, Abdi produces 80W of power doing 4000J
of work. How long did he row?

Answer 1

Answer:

50 seconds

Explanation:

As we know that power is calculated by ,

• power = work /time

Calculating the time :

• Time = Work/Power

we are given that While rowing across the lake during a race, Abdi produces 80W of power doing 4000J

of work.

So,

• Power = 80 W
• work = 4000 J

Plugging the required values,

• Time = 4000/80
• Time = 50 secs.

Hence, Abdi rowed for 50 seconds

Answer 2

Answer:

50 s

Explanation:

Power = work / time

P = W / t

80 W = 4000 J / t

t = 50 s