9th Class Science Time and Motion Question Bank

done Assertion and Reason MCQs - Motion Total Questions - 10

• question_answer1)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion Displacement of body may be zero, when distance travelled by it is not zero.

  Reason The displacement is the longer distance between initial and final positions.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer2)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion The speedometer of an automobile measures the average speed of the automobile.

  Reason Average velocity is equal to total displacement per total time taken.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer3)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion The average and instantaneous velocity have same value in a uniform motion.

  Reason In uniform motion, the velocity of an object increases uniformly.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer4)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion Acceleration of a moving body is always positive.

  Reason Acceleration of a moving body is the rate of change in velocity with respect to time.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer5)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion Acceleration and displacement are in the opposite directions during retardation.

  Reason Acceleration is given as the change in velocity per unit time.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer6)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion The position-time graph of a uniform motion in one-dimension of a body can have negative slope.

  Reason When the speed of body decreases with time, the position-time graph of the moving body has negative slope.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer7)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion Position-time graph of a stationary object is a straight line parallel to time axis.

  Reason For a stationary object, position does not change with time.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer8)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion Displacement of a body is the vector sum of area under velocity-time graph.

  Reason Displacement is a vector quantity.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer9)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion Circular motion is an example of uniform accelerated motion.

  Reason A uniform circular motion, there is no acceleration.

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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• question_answer10)

  Direction: For question given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below

  Assertion A body can have acceleration even its speed is constant.

  Reason In uniform circular motion, speed of body is constant but its velocity continuously changes

  A)
  Both A and R are true and R is correct explanation of the A. done clear
  B)
  Both A and R are true but R is not the correct explanation of the A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
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