How much work is performed by a machine that operates at 300 ft. lb./sec over the span of one minute?

To find the total work performed by the machine, you can use the formula that relates power and time. Power is the rate at which work is done, and it can be expressed in foot-pounds per second.

Given that the machine operates at 300 foot-pounds per second, you can calculate the amount of work done over one minute (which is 60 seconds) by multiplying the power by the total time:

Work = Power × Time

Substituting the known values:

Work = 300 ft lb/sec × 60 sec

Calculating that gives:

Work = 18,000 ft lb

This means that the machine performs a total of 18,000 foot-pounds of work in one minute. Therefore, the choice that reflects this correct calculation is indeed the right answer.