Physics

Problem

Machine A does

6.0\,\text{kJ}

of work in

10\,\text{s}

, while Machine B does

4.5\,\text{kJ}

of work in

6.0\,\text{s}

. a. (i) Calculate the average power output of each machine. b. (ii) Which machine is more powerful, and by what percentage is its power greater than that of the other machine?

Intuitive explanation

Power is the rate at which work gets done—it's not just how much work, but how fast. To compare these machines fairly, calculate each one's power by dividing work by time, then see which delivers energy more quickly. The machine with higher power is the more efficient worker.

Intuitive explanation

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