2. Questions Bank
  3. 9th Class
  4. Science
  5. Work and energy

9th Class Science Work and energy Question Bank Work Power and Energy Summative Objective Problems

  • question_answer
    Statement I: If a body is lifted vertically upwards, then the force required to lift the body is equal to it weight Statement II: Work done in lifting a body = weight of body x vertical distance

    A)  Both Statements are true, Statement-II is the correct explanation of Statement-I.

    B)  Both Statements are true, Statement-II is not correct explanation of Statement-I.

    C)  Statement-I is true, Statement-II is false.

    D)  Statement-I is false. Statement-II is true.

    Correct Answer: B

    Solution :

      \[W=mgh\]         (as h is same)


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