7th Class Science Related to Competitive Exam Question Bank Work and energy

  • question_answer
    DIRECTIONS: On the basis of following diagram/ picture answer the questions given below: The girl in the picture above is using a long bar to lift a heavy box. Using the bar makes the girl's task easier by

    A) reducing the input force

    B) reducing the box's mass

    C) increasing the amount of work done

    D) increasing the distance the box is lifted

    Correct Answer: A

    Solution :

        reducing the input force


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