Back to MOTION IN A STRAIGHT LINE
JEE PHYSICS MCQ: MOTION IN A STRAIGHT LINE
1
Medium
1 of 1
Understanding
+4 | -1
Assertion: The average velocity of the object over an interval of time is either smaller than or equal to the average speed of the object over the same interval.
Reason: Velocity is a vector quantity and speed is a scalar quantity.
Reason: Velocity is a vector quantity and speed is a scalar quantity.
View answer and explanation
Correct option: A
Assertion is correct, reason is correct; reason is a correct explanation for assertion.
Option A (Assertion is correct, reason is correct; reason is a correct explanation for assertion) is correct because the average velocity's magnitude is always less than or equal to the average speed due to displacement being less than or equal to distance, and this is because velocity is a vector and speed is a scalar.
More Questions from MOTION IN A STRAIGHT LINE
Practice All Chapter MCQs →
Assertion: In a free fall, the initial velocity of a body may not be zero.
Reason: Free fall means the vertical acceleration of the body is equal to . A ball is thrown vertically upward with speed 15 m/s and it returns to the ground with speed 10 m/s as a constant air resistance acts. The maximum height attained by the ball is Which of the following is not a derived quantites? Assertion: If a body is dropped from the top of a tower of height and another body is thrown up simultaneously with velocity from the foot of the tower, then both of them would meet after a time .
Reason: For a body projected upwards, the distance covered by the body in the last second of its upward journey is always irrespective of velocity of projection. A particle is having uniform acceleration. If its displacement from to second is and change in velocity is . Find its displacement (in ) in second. An aeroplane flies 400m north and 300m south and then flies 1200m upwards, then net displacement is
Reason: Free fall means the vertical acceleration of the body is equal to . A ball is thrown vertically upward with speed 15 m/s and it returns to the ground with speed 10 m/s as a constant air resistance acts. The maximum height attained by the ball is Which of the following is not a derived quantites? Assertion: If a body is dropped from the top of a tower of height and another body is thrown up simultaneously with velocity from the foot of the tower, then both of them would meet after a time .
Reason: For a body projected upwards, the distance covered by the body in the last second of its upward journey is always irrespective of velocity of projection. A particle is having uniform acceleration. If its displacement from to second is and change in velocity is . Find its displacement (in ) in second. An aeroplane flies 400m north and 300m south and then flies 1200m upwards, then net displacement is