2 A train is travelling at maximum speed with its engine using its maximum power of 1800 kW When travelling at this speed the train experiences a total resistive force of 40000 N Find the maximum speed of the train. Circle your answer.
[0pt] [1 mark]
\(22 \mathrm {~m} \mathrm {~s} ^ { - 1 }\)
\(45 \mathrm {~m} \mathrm {~s} ^ { - 1 }\)
\(54 \mathrm {~m} \mathrm {~s} ^ { - 1 }\)
\(90 \mathrm {~m} \mathrm {~s} ^ { - 1 }\)