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JEE PHYSICS MCQ: MOTION IN A STRAIGHT LINE
1
Medium
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Application
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A particle starts moving from rest under uniform acceleration. It travels a distance in the first $2 secons$ and a distance in the next $2 sec$. If then is
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Correct option: A
3
Option A (3) is correct because the distance traveled in equal intervals of time under uniform acceleration follows a specific ratio.
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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