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9th Class Science Work and energy Question Bank Work Power and Energy Formative Subjective Problems

  • question_answer
    A boat is moving through the water, at the rate of 10 m/s. Its engine have a power of 50 kilowatts. Find the force which must be overcomed in moving through water.

    Answer:

    \[V=10\,\,m/s\] \[P=50\,Kw=50\times {{10}^{3}}w\] \[F=?\] \[P=FV\] or \[F=\frac{P}{V}=\frac{50\times {{10}^{3}}}{10}=5000\,N\]


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