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

  • question_answer
    DIRECTIONS: The questions in this segment consist of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of I the assertion. Select your answers to these items using codes given below. Assertion (A): When a body is displaced from its initial position, then in such a situation work is always done by the force applied on the body Reason (R): Work = force\[\times \]displacement

    A) Both A and R are true and R is the correct explanation of A.

    B) Both A and R are true but R is not the correct explanation of A.

    C) A is true but R is false.

    D) A is false but R is true.

    Correct Answer: B

    Solution :

        Work is not done when a body displaced perpendicularly to the applied force.


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