Question

It takes 50 seconds for Tyler to do 450 Joules of work. How much power did Tyler use?​

Answer 1

Power=work/time
So,
Power =450/50=9watts

Answer 2

Answer:

Power = 450 Joules / 50 seconds = 9 J/s = 9 W *average* power

Explanation:

Power = Energy / Time ( or Work / Time) just as Velocity = Distance / Time

So, the average power needed for 50 seconds to do 450 Joules of work is simply 450 J / 50 s = 9 J/s = 9 Watts  (The unit Watt is defined so that 1 Watt = 1 Joule / Second).  It's important to note that 9W is the *average* power. The problem does not say that Tyler does work at a constant rate, so it's worth adding that caveat to the answer!