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: Two objects, a chalk box of mass 0.5 kg and a ball of mass 0.8 kg are placed at same height h as shown in figure. Then the potential energy is

    A) greater for chalk box

    B) greater for ball

    C) same for both chalk box and ball

    D) cannot say

    Correct Answer: B

    Solution :

        For chalk box \[\text{P}.\text{E}.=0.\text{5gh}\] \[(\because P.E=mgh)\] For ball P.E. \[=0.8gh\]


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