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9th Class Science Work and energy Question Bank Work, Energy and Power

  • question_answer
    A particle moving along a line travels a distance of 10 m under the action of a force of 5 N. If the work done is 25 J, then the angle between the force and the direction of motion is

    A) \[0{}^\circ \]                      

    B)        \[30{}^\circ \]

    C) \[45{}^\circ \]

    D)        \[60{}^\circ \]  

    Correct Answer: D

    Solution :

                    \[W=F\cdot S\cos \theta \] or            \[25=5\times 10\cos \theta \] or            \[\theta ={{60}^{o}}\]


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