Final answer:
The power of the machine is calculated by dividing the work done (1,500 joules) by the time taken (30 seconds). The resulting power is 50 watts.
Step-by-step explanation:
The power of a machine is defined as the work done divided by the time taken to do that work. Given that the machine does 1,500 joules of work in 30 seconds, we can calculate its power using the formula power = work / time.
In this case, work = 1,500 joules and time = 30 seconds, so:
power = 1,500 J / 30 s = 50 W.
Therefore, the power of this machine is 50 watts.