Motion in a Straight Line Class 11 MCQs(part-2) Questions with Answers

Motion in a Straight Line Class 11 MCQs Questions with Answers

Question 1.The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to

(a) 1 s
(b) 2 s
(c) 3 s
(d) 4 s

Answer

Answer: (b) 2 s

Question 2.
A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is
(a) 3 km/h
(b) zero
(c) 2 km/h
(d) 1.5 km/h

Answer

Answer: (a) 3 km/h

Question 3.
A 180 metre long train is moving due north at a speed of 25 m/s. A small bird is flying due south, a little above the train, with a speed of 5 m/s. The time taken by the bird to cross the train is
(a) 10 s
(b) 12 s
(c) 9 s
(d) 6 s

Answer

Answer: (d) 6 s

Question 4.
A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one hour to do so, his average velocity is
(a) 3 km/h
(b) zero
(c) 1.5 km/h
(d) 2 km/h

Answer

Answer: (b) zero

Question 5.
A body starts from rest and travels with uniform acceleration on a straight line. If its velocity after making a displacement of 32 m is 8 m/s, its acceleration is
(a) 1 m/s²
(b) 2 m/s²
(c) 3 m/s²
(d) 4 m/s²

Answer

Answer: (a) 1 m/s²

Question 6.
Which one of the following is the unit of velocity?
(a) kilogram
(b) metre
(c) m/s
(d) second

Answer

Answer: (c) m/s

Question 7.
A body starts from rest and travels for t second with uniform acceleration of 2 m/s². If the displacement made by it is 16 m, the time of travel t is
(a) 4 s
(b) 3 s
(c) 6 s
(d) 8 s

Answer

Answer: (a) 4 s

Question 8.
The dimensional formula for speed is
(a) T-1
(b) LT-1
(c) L-1T-1
(d) L-1T

Answer

Answer: (b) LT-1

Question 9.
The dimensional formula for velocity is
(a) [LT]
(b) [LT-1]
(c) [L2T]
(d) [L-1T]

Answer

Answer: (b) [LT-1]

Question 10.
A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s . Then t is
(a) 10 s
(b) 5 s
(c) 20 s
(d) 6 s

Answer

Answer: (b) 5 s

Question 11.
A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one hour to do so, his average velocity is
(a) 3 km/h
(b) zero
(c) 1.5 km/h
(d) 2 km/h

Answer

Answer: (b) zero

Question 12.
A body starts from rest. If it travels with an acceleration of 2 m/s², its displacement at the end of 3 seconds is
(a) 9 m
(b) 12 m
(c) 16 m
(d) 10 m

Answer

Answer: (a) 9 m

Question 13.
A body starts from rest and travels with uniform acceleration of 2 m/s². If its velocity is v after making a displacement of 9 m, then v is
(a) 8 m/s
(b) 6 m/s
(c) 10 m/s
(d) 4 m/s

Answer

Answer: (b) 6 m/s

Question 14.
A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s. Then t is
(a) 10 s
(b) 5 s
(c) 20 s
(d) 6 s

Answer

Answer: (b) 5 s

Question 15.
A body starts from rest and travels for five seconds to make a displacement of 25 m if it has travelled the distance with uniform acceleration a then a is
(a) 3 m/s²
(b) 4 m/s²
(c) 2 m/s²
(d) 1 m/s²

Answer

Answer: (c) 2 m/s²

Question 16:
A boy moves on a circular distance of radius R. Starting from a point A he moves to a point B which is on the other end of the diameter AB. The ratio of the distance travelled to the displacement made by him is
(a) ∏/2
(b) ∏
(c) 2∏
(d) 4∏

Answer

Answer: (a) ∏/2

Question 17.
The dimensional formula for acceleration is
(a) [LT2]
(b) [LT?2]
(c) [L2T]
(d) [L2T2]

Answer

Answer: (b) [LT?2]

Question 18.
A body starts from rest and travels with uniform acceleration a to make a displacement of 6 m. If its velocity after making the displacement is 6 m/s, then its uniform acceleration a is
(a) 6 m/s²
(b) 2 m/s²
(c) 3 m/s²
(d) 4 m/s²

Answer

Answer: (c) 3 m/s²

Question 19.
Which one of the following is the unit of velocity?
(a) kilogram
(b) metre
(c) m/s
(d) second

Answer

Answer: (c) m/s

Question 20.
The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to
(a) 1 s
(b) 2 s
(c) 3 s
(d) 4 s

Answer

Answer: (b) 2 s


for MCQS of projectile motion CLICK HERE




Comments

Post a Comment

Popular posts from this blog

MCQS of projectile motion(part -1)

  Q1: A stone is just released from the window of a train moving along a horizontal straight track. The stone will hit the ground following Hyperbolic path Straight path Circular path Parabolic path Answer: (d) Parabolic path Q2: A bullet is dropped from the same height when another bullet is fired horizontally. They will hit the ground Simultaneously Depends on the observer One after the other None of the above Answer: (b) Simultaneously Q3: A bomb is dropped from an aeroplane moving horizontally at a constant speed. When air resistance is taken into consideration, the bomb Flies with the aeroplane Falls to earth behind the aeroplane Falls to earth ahead of the plane Falls to earth exactly below the aeroplane Answer: (b) Falls to earth behind the aeroplane Q4: The maximum range of gum on horizontal terrain is 16 km. If g = 10 m/s2. What must be the muzzle velocity of the shell? 400 m/s 100 m/s 200 m/s 50 m/s Answer: (a) 400 m/s Q5: An aeroplane flying 490 m above ground level at 100 m
Read more

DYNAMICS, Laws of Motion MCQ Questions Physics with Answers

Question: Newton's first law of motion describes the a) inertia b) energy c) work d) moment of inertia Answer: inertia   Question: Inertia is the property of a body linked to tendency of a body a) to resist any change in its state b) to change the momentum c) to change its direction d) to change its position Answer: to resist any change in its state   Question: Physical independence of force is a consequence of a) first law of motion b) third law of motion c) second law of motion d) all of these Answer: first law of motion   Question: A reference frame attached to the earth a) cannot be an inertial frame because earth is revolving round the sun b) is an inertial frame by definition c) is an inertial frame because Newton's laws are applicable d) is an inertial frame because the earth is rotating about its own axis Answer: cannot be an inertial frame because earth is revolving round the sun   Question: The direction of impulse is a) same as that of the net force b) opposite to th
Read more

Projectile Motion” MCQS(part-2)

1. A body of mass m, projected at an angle of θ from the ground with an initial velocity of v, acceleration due to gravity is g, what is the maximum horizontal range covered? a) R = v2 (sin 2θ)/g b) R = v2 (sin θ)/2g c) R = v2 (sin 2θ)/2g d) R = v2 (sin θ)/g 2. A body of mass 5 kg, projected at an angle of 60° from the ground with an initial velocity of 25 m/s, acceleration due to gravity is g = 10 m/s2, what is the maximum horizontal range covered? a) 54.13 m b) 49 m c) 49.16 m d) 60 m 3. A body of mass 10 kg, projected at an angle of 30° from the ground with an initial velocity of 5 m/s, acceleration due to gravity is g = 10 m/s2, what is the time of flight? a) 0.866s b) 1.86 s c) 1.96 s d) 1.862s 4. On calculating which of the following quantities, the mass of the body has an effect in simple projectile motion? a) Velocity b) Force c) Time of flight d) Range 5. A ball of mass 100 g, projected at an angle of 30° from the ground with an initial velocity of 11 m/s, acceleration due to
Read more