2. Questions Bank
  3. 7th Class
  4. Science
  5. Time and Motion

7th Class Science Time and Motion Question Bank Motion and Time

  • 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 the assertion. Select your answers to these items using codes given below. Assertion (A): Velocity-time graph for an object in uniform motion along a straight path is a straight line parallel to the time axis. Reason (R): In uniform motion of an object velocity increases as the square of time elapsed.

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

    B) Both A and R is 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: C

    Solution :

        In uniform motion the object moves with uniform velocity, the magnitude of its velocity at different instant \[\text{i}\text{.e}\text{.,}\]at \[\text{t=0,t=1sec,t=2sec}.......\]will always be constant. Thus velocity-time graph for an object in uniform motion along a straight path is a straight line parallel to time axis.


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