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NCERT Solutions for class 11 Physics | Chapter 3 - Motion in a Straight Line

Free download in PDF Class 11 Physics Chapter 3 Motion in a Straight Line Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. These short solved questions or quizzes are provided by Gkseries. These will help the students for preparation of their examination./p>

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(1) A body is thrown upwards and reaches half of its maximum height. At that position
[A] its acceleration is constant
[B] its velocity is zero
[C] its velocity is maximum
[D] its acceleration is minimum
Answer: its acceleration is constant
(2) Velocity time curve for a body projected vertically upwards is
[A] straight line
[B] ellipse
[C] parabola
[D] hyperbola
Answer: straight line
(3) The area under acceleration time graph gives
[A] change in velocity
[B] change in acceleration
[C] distance travelled
[D] force acting
Answer: change in velocity
(4) The slope of velocity-time graph for motion with uniform velocity is equal to
[A] zero
[B] final velocity
[C] initial velocity
[D] none of these
Answer: zero
(5) Which of the following is a one dimensional motion ?
[A] Motion of train running on a straight track
[B] Motion of satellite
[C] Motion of air particle
[D] Motion of snake
Answer: Motion of train running on a straight track
(6) A body is moving along a straight line path with constant velocity. At an instant of time the distance travelled by it is S and its displacement is D, then
[A] D = S
[B] D > S
[C] D < S
[D] None of these
Answer: D = S
(7) The displacement of a body is zero. The distance covered
[A] may or may not be zero
[B] is not zero
[C] is zero
[D] depends upon the acceleration
Answer: may or may not be zero
(8) Which of the following can be zero, when a particle is in motion for some time?
[A] Displacement
[B] None of these
[C] Distance
[D] Speed
Answer: Displacement
(9) The distance travelled by a body is directly proportional to the time taken. Its speed
[A] remains constant
[B] decreases
[C] increases
[D] becomes zero
Answer: remains constant
(10) The acceleration of a moving body can be found from
[A] slope of the velocity- time graph
[B] slope of distance-time graph
[C] area under distance -time graph
[D] area under velocity - time graph
Answer: slope of the velocity- time graph
(11) Two trains, each 40 m long are travelling in opposite direction with equal velocity 20 m/s. The time of crossing is
[A] 1 s
[B] 2 s
[C] 3 s
[D] 4 s
Answer: 1 s
(12) A body is thrown vertically upwards. If air resistance is to be taken into account, then the time during which the body rises is
[A] less than the time of fall
[B] greater than the time of fall
[C] twice the time of fall
[D] equal to the time of fall
Answer: less than the time of fall
(13) The location of a particle has changed. What can we say about the displacement and the distance covered by the particle?
[A] Neither can be zero
[B] One may be zero
[C] Both may be zero
[D] 1.5 km/h
Answer: Neither can be zero
(14) If distance covered by a particle is zero, what can you say about its displacement?
[A] It must be zero
[B] It cannot be zero
[C] It may or may not be zero
[D] It is negative
Answer: It must be zero
(15) Acceleration of a particle changes when
[A] speed changes
[B] magnitude of velocity changes
[C] direction of velocity changes
[D] None of these
Answer: speed changes
(16) What determines the nature of the path followed by the particle?
[A] Both
[B] Velocity
[C] Acceleration
[D] None of these
Answer: Both
(17) The graph between displacement and time for a particle moving with uniform acceleration is a/an
[A] parabola
[B] ellipse
[C] straight line parallel to time axis
[D] straight line with a positive slope
Answer: parabola
(18) The numerical ratio of displacement to distance for a moving object is
[A] equal to or less than 1
[B] always equal to 1
[C] always less than 1
[D] always more than 1
Answer: equal to or less than 1
(19) The ratio of the numerical values of the average velocity and average speed of a body is
[A] unity or less
[B] less than unity
[C] unity
[D] unity or more
Answer: unity or less
(20) A ball is bouncing elastically with a speed 1 m/s between walls of a railway compartment of size 10 m in a direction perpendicular to walls. The train is moving at a constant velocity of 10 m/s parallel to the direction of motion of the ball. As seen from the ground,
[A] the direction of motion of the ball changes every 10 seconds.
[B] speed of ball changes every 10 seconds.
[C] average speed of ball over any 20 second interval is fixed.
[D] the acceleration of ball is the same as from the train.
Answer: B, C, D

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