NEET Physics Non Uniform Motion MCQs Set A

Question. The graph between displacement and time for a particle moving with uniform acceleration is a/an
(a) parabola
(b) straight line with a positive slope
(c) ellipse
(d) straight line parallel to time axis

Answer: A

Question. 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: A

Question. Acceleration of a particle changes when
(a) speed changes
(b) magnitude of velocity changes
(c) direction of velocity changes
(d) None of these

Answer: A

Question.  The area under acceleration time graph gives
(a) change in velocity
(b) change in acceleration
(c) distance travelled
(d) force acting

Answer: A

Question.  The incorrect statement(s) from the following is/are
I. A body having zero velocity will not necessarily have zero acceleration.
II. A body having zero velocity will necessarily have zero acceleration.
III. A body having uniform speed can have only uniform acceleration.
IV. A body having non-uniform velocity will have zero acceleration.
(a) II, III and IV
(b) II and III
(c) I and II
(d) IV only

Answer: A

Question.  If a body travels with constant acceleration, which of the following quantities remains constant ?
(a) None of these
(b) Velocity
(c) Displacement
(d) Time

Answer: A

Question. Velocity time curve for a body projected vertically upwards is
(a) straight line
(b) ellipse
(c) parabola
(d) hyperbola

Answer: A

Question.  A bus starts moving with acceleration 2 m/s². A cyclist 96 m behind the bus starts simultaneously towards the bus at 20 m/s. After what time will he be able to overtake the bus?
(a) 8 sec
(b) 18 sec
(c) 16 sec
(d) 4 sec

Answer: A

Question.  Stopping distance of a moving vehicle is directly proportional to
(a) square of the initial velocity
(b) square of the initial acceleration
(c) the initial velocity
(d) the initial acceleration

Answer: A

Question.  The displacement of a particle is represented by the following equation: S = 3t³ + 7t² + 5t + 8 where 5 is in meter and t in second. The acceleration of the particle at t = 15 is
(a) 32 m/s²
(b) zero
(c) 18 m/s²
(d) 14 m/s²

Answer: A

Question. If a train travelling at 20 m/s is to be brought to rest in a distance of 200 m, then its retardation should be
(a) 1 m/s²
(b) 10 m/s²
(c) 2 m/s²
(d) 20 m/s²

Answer: A

Question. Assertion : A body may be accelerated even when it is moving uniformly.
Reason : When direction of motion of the body is changing, the body must have acceleration
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct

Answer: A

Question.  A body covers 26, 28, 30, 32 meters in 10th, 11th, 12th and 13th seconds respectively. The body starts
(a) with an initial velocity and moves with uniform acceleration
(b) with an initial velocity and moves with uniform velocity
(c) from rest and moves with uniform velocity
(d) from rest and moves with uniform acceleration

Answer: A

Question.  A particle experiences constant acceleration for 20 seconds after starting from rest. If it travels a distance s₁ in the first 10 seconds and distance s₂ in the next 10 seconds, then
(a) s₂ = 3 s₁
(b) s₂ = 4 s₁
(c) s₂ = s₁
(d) None of these

Answer: A

Question.  If a car at rest accelerates uniformly to a speed of 144 km/h in 20 s, it covers a distance of
(a) 400 m
(b) 20 m
(c) 1440 m
(d) 2880 m

Answer: A

Question.  The dependence of velocity of a body with time is given by the equation v = 20 +0.1t². The body is in
(a) non-uniform acceleration
(b) zero acceleration
(c) uniform acceleration
(d) uniform retardation

Answer: A

Question. Assertion : A particle starting from rest and moving with uniform acceleration travels' a length of x and 3x in first two and next two-seconds.
Reason : Displacement is directly proportional to velocity
(a) Assertion is correct, reason is incorrect
(b) Assertion is incorrect, reason is correct
(c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Answer: A

Question. Assertion : The equation of motion can be applied only if acceleration is along the direction of velocity and is constant.
Reason : If the acceleration of a body is zero then its motion is known as uniform motion.
(a) Assertion is incorrect, reason is correct.
(b) Assertion is correct, reason is incorrect
(c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: A

Question.  A particle moves along a straight line OX. At a time t (in second) the distance x (in metre) of the particle from O is given by x = 40 + 12t – t³. How long would the particle travel before coming to rest?
(a) 56 m
(b) 16 m
(c) 40 m
(d) 24 m

Answer: A

Question.  A particle moves a distance x in time t according to equation x = (t + 5)^–1. The acceleration of particle is proportional to
(a) (velocity) ^3/2
(b) (distance)^–2
(c) (distance)²
(d) (velocity)^2/3

Answer: A

Question.  A bike accelerates from rest at a constant rate 5 m/s² for some time after which it decelerates at a constant rate 3 m/s² to come to rest. If the total time elapsed is 8 second, the maximum velocity acquired by the bike is given by
(a) 15 m/s
(b) 12 m/s
(c) 10 m/s
(d) 5 m/s

Answer: A

Question. A metro train starts from rest and in 5 s achieves 108 km/h. After that it moves with constant velocity and comes to rest after travelling 45 m with uniform retardation. If total distance travelled is 395 m, find total time of travelling
(a) 17.2 s
(b) 9 s
(c) 15.3 s
(d) 12.2 s

Answer: A