PH-2358

Power

Physics · Secondary 4 · Hard · Power

A train of mass

2.0 \times 10^5\,\text{kg}

travels at a constant speed of

30\,\text{m/s}

. The total resistive force acting on the train is

4.0 \times 10^4\,\text{N}

. What is the power output of the train’s engine to maintain this speed?

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