Law Of Motion MCQ

Test your knowledge with important Law Of Motion MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Law Of Motion MCQs at Bissoy

• When bullet is fired from the gun, the gun pushes in the opposite direction. This is an example of Newton's law.
  ক

  First and second laws of motion

  খ

  Third law of motion

  গ

  Second law of motion

  ঘ

  First law of motion
• The speed of an object falling freely is an example of:
  ক

  rectangular motion

  খ

  uneven accelerated motion

  গ

  uniform acceleration motion

  ঘ

  circular motion
• Starting from rest, Sunil's car attains a speed of 20 m/s in 10 sec. Find the acceleration of the car?
  ক

  2 ms²

  খ

  2 ms^-2

  গ

  2 ms¹

  ঘ

  2 ms^-1
• The famous law of motion is given by-
  ক

  Dalton

  খ

  Newton

  গ

  Galileo

  ঘ

  Thomson
• The speed of a particle or any instant of time is called its
  ক

  instantaneous speed

  খ

  instantaneous velocity

  গ

  displacement

  ঘ

  None of the above
• 1 kg × 1 ms², It is said . . . . . . . .
  ক

  1 newton

  খ

  1 coulomb

  গ

  1 pascal

  ঘ

  1 joul
• During . . . . . . . . motion of an object along a straight line, the change in velocity of the object for any time interval is zero.
  ক

  linear

  খ

  translational

  গ

  equilibrium

  ঘ

  uniform
• Acceleration of an object moving at uniform velocity is-
  ক

  unequal

  খ

  positive

  গ

  negative

  ঘ

  zero
• For a body moving with uniform acceleration its final velocity equals . . . . . . . .
  ক

  average velocity - initial velocity

  খ

  2 × average velocity - initial velocity

  গ

  2 × average velocity + initial velocity

  ঘ

  average velocity + initial velocity
• The velocity of an object is proportional to the time elapsed. The object has-
  ক

  uneven acceleration

  খ

  uniform acceleration

  গ

  uniform speed

  ঘ

  uneven speed
• The distance-time graph for the motion of an object moving with a constant speed is a
  ক

  dot

  খ

  circle

  গ

  straight line

  ঘ

  curve
• Statement I When a gun is fired, i.e. it placing pushes back with much less velocity than the velocity of the bullet.<br>Statement II Velocity of the recoiling gun is less because the gun is much heavier than bullet.<br>According to the Principle of conservation of momentum when the gun is fired, momentum of gun and bullet system remains constant.
  ক

  Both the statements are individually true and statement II is the correct explanation of statement I

  খ

  Both the statements are individually true but statement II is not the correct explanation of statement I

  গ

  Statement I is true, but statement II is false

  ঘ

  Statement I is false, but statement II is true
• An athelete runs for some time before the high jump so that the inertia of the . . . . . . . . helps him take the long jump.
  ক

  rest

  খ

  direction

  গ

  size

  ঘ

  speed
• The velocity of a car increases uniformly from 18 kmhr^-1 to 72 kmhr^-1 in 10 s. Calculate the acceleration of the car.
  ক

  1.5 ms^-2

  খ

  15 ms^-2

  গ

  1.5 ms²

  ঘ

  15 ms^-1
• At any moment, the acceleration of a rocket is proportional to the n^th power of the velocity of the released gases. The value of 'n' should be-
  ক

  1

  খ

  2

  গ

  -1

  ঘ

  -2
• Speed of body is
  ক

  the distance covered by a moving body in unit time

  খ

  always equal to velocity of body

  গ

  a vector quantity

  ঘ

  None of the above
• Among which of the following is the maximum value of inertia?
  ক

  Same size of rubber ball and stone

  খ

  Scooter and bus

  গ

  Ten rupee coins and five rupee coins

  ঘ

  Trains and aeroplanes
• The correct relation of speed, distance and time is . . . . . . . .
  ক

  $$S = \frac{T}{D}$$

  খ

  $$S = \frac{D}{T}$$

  গ

  S = D × T

  ঘ

  S = D - T
• If we move the tree branch fast then some of the leaves get detached from the tree due to-
  ক

  Acceleration

  খ

  Velocity

  গ

  Inertia

  ঘ

  Impulse
• Which of the following examples illustrates Newton's first law of motion?
  ক

  When we stop pedaling, the cycle starts to slow down

  খ

  While catching a fast approaching cricket ball, the fielder slowly moves his hand backwards with the moving ball

  গ

  When a bus starts abruptly, the passengers are jerked backwards

  ঘ

  Rocket launching
• A man weighing 70 kg is coming down in lift. It the cable of the lift breaks sudden, the weight of the man would become
  ক

  70 kg

  খ

  35 kg

  গ

  140 kg

  ঘ

  zero
• Force/mass = . . . . . . . .
  ক

  momentum

  খ

  acceleration

  গ

  displacement

  ঘ

  velocity
• In a vacuum, a five-rupee coin a, feather of sparrow bird and a mango are dropped simultaneously from the same height. The time taken by them to reach the bottom is t₁, t₂ and t₃, respectively. In this situation, we will observe that
  ক

  t₁ &gt; t₂ &gt; t₃

  খ

  t₁ &gt; t₃ &gt; t₂

  গ

  t₃ &gt; t₁ &gt; t₂

  ঘ

  t₁ = t₂ = t₃
• A brass ball is tied to a thin wire and swung so as to move uniformly in a horizontal circle. Which of the following statements in this regard is/are true?<br>1. The ball moves with constant velocity.<br>2. The ball moves with constant speed.<br>3. The ball moves with constant acceleration.<br>4. The magnitude of the acceleration of the ball is constant.<br>Select the correct answer:
  ক

  Only 1

  খ

  1 and 3

  গ

  1, 2 and 4

  ঘ

  2 and 4
• According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the . . . . . . . . of an object.
  ক

  density

  খ

  volume

  গ

  force

  ঘ

  mass
• A ball balanced on a vertical rod is an example of
  ক

  stable equilibrium

  খ

  unstable equilibrium

  গ

  neutral equilibrium

  ঘ

  perfect equilibrium
• A car starts from Bengaluru, goes 50 km in a straight line towards South, immediately turns around and returns to Bengaluru. The time taken for this round trip is 2h. The magnitude of the average velocity of the car for this round trip
  ক

  is zero

  খ

  is 50 km/h

  গ

  is 25km/h

  ঘ

  cannot be calculated without knowing acceleration
• Applying a force of 5 newtons on a wooden plank with mass m₁ kg, it accelerates with an acceleration of 10 ms^-2. Another plank of mass m₂ kg accelerates with an acceleration of 20 ms^-2 when the same force is applied. If both the planks are tied with each other and the same force is applied on them, what will be the acceleration?
  ক

  6.67 ms^-2

  খ

  1.67 ms^-2

  গ

  5.67 ms^-2

  ঘ

  4.67 ms^-2
• Assertion (A) A body having non-zero acceleration can have a constant velocity.<br>Reason (R) Acceleration is the rate of change of velocity.
  ক

  Both A and R are true and R is the correct explanation of A

  খ

  Both A and R are true, but R is not the correct explanation of A

  গ

  A is true, but R is false

  ঘ

  A is false, but R is true
• Retardation means an object operates from . . . . . . . .
  ক

  fixed velocity

  খ

  decreasing velocity

  গ

  increasing velocity

  ঘ

  uniform velocity