Motion in a Plane MCQ

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

• A stone tied to the end of string 80cm long is whirled in horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 sec, what is the magnitude of acceleration of the stone?
  ক

  680 cm/s2

  খ

  860 cm/s2

  গ

  720 cm/s2

  ঘ

  990 cm/s2
• An aeroplane flying horizontally with a speed of 360km/h releases a bomb at a height of 490m from the ground. If g=9.8m/s2, it will strike the ground at ___________
  ক

  10km

  খ

  100km

  গ

  1km

  ঘ

  16km
• At the highest point of a projectile, its velocity and acceleration are at an angle of ___________
  ক

  0°

  খ

  45°

  গ

  90°

  ঘ

  180°
• Which of the following is constant in projectile motion?
  ক

  Horizontal component

  খ

  Vertical component

  গ

  Velocity of projection

  ঘ

  Acceleration of projected object
• A body A is dropped from vertically from the top of a tower. If another identical body is thrown horizontally from the same point at the same instant, then ___________
  ক

  A will reach the ground earlier

  খ

  B will reach the ground earlier than A

  গ

  Both A and B will reach the ground simultaneously

  ঘ

  Depends on external factors
• Two vectors have a resultant equal to either. The angle between them is ___________
  ক

  60°

  খ

  120°

  গ

  90°

  ঘ

  100°
• A body executing uniform circular motion has at any instant is velocity vector and acceleration vector ___________
  ক

  Along the same direction

  খ

  In opposite direction

  গ

  Normal to each other

  ঘ

  Not related to each other
• Three particles A,B and C are projected from the same point with the same initial speed making angles 30°,45° and 60° respectively with the horizontal. Which of the following statements is correct?
  ক

  A, B and C have unequal ranges

  খ

  Ranges of A and C are equal and less than that of B

  গ

  Ranges of A and C are equal and greater than that of B

  ঘ

  A, B and C have equal ranges
• Two bullets are fired simultaneously, horizontally and with different speeds from the same place. Which bullet will hit the ground first?
  ক

  The faster one

  খ

  Depends on their mass

  গ

  The slower one

  ঘ

  Both will reach simultaneously
• A projectile fired from the ground follows a parabolic path. At what position will the speed of projectile be minimum?
  ক

  At the top of the path

  খ

  At the beginning of the path

  গ

  While travelling along the path

  ঘ

  Never
• A scalar quantity is conserved in a process.
  ক

  True

  খ

  False
• The net acceleration of a particle in circular motion is ___________
  ক

  Towards the centre

  খ

  Always along the radius

  গ

  Irregular

  ঘ

  Circular in motion
• A passenger arriving in a new town wishes to go from the station to a hotel located 10km away on a straight road from the station. A dishonest cabman takes him along a circuitous path 23km long and reaches the hotel in 28 minutes, what is the average speed of the taxi?
  ক

  21.43km/h

  খ

  75km/h

  গ

  49.3km/h

  ঘ

  21km/h
• The total path length is always equal to the magnitude of the displacement vector of a particle.
  ক

  True

  খ

  False
• Two persons are pulling the ends of a string in such a way that the string is stretched horizontally. When a weight of 10kg is suspended in the middle of the string the string does not remain horizontal. Can the persons make it horizontal again by pulling it with a greater force?
  ক

  Yes

  খ

  No
• What is the minimum number of coplanar vectors of different magnitudes which can give zero resultant?
  ক

  One

  খ

  Two

  গ

  Three

  ঘ

  Four
• Pressure is a vector.
  ক

  True

  খ

  False
• Find the magnitude of the centripetal acceleration of a particle on the tip of a fan blade, 0.30 metre in diameter, rotation at 1200 rev/minute
  ক

  40 m/s2

  খ

  4737.6 m/s2

  গ

  245 m/s2

  ঘ

  20 m/s2
• Calculate the angular speed of flywheel making 420 revolutions per minute.
  ক

  42300 rad/sec

  খ

  1200 rad/sec

  গ

  10/4200 rad/sec

  ঘ

  44 rad/sec
• In projectile motion, magnitude remains constant but the direction continuously changes.
  ক

  True

  খ

  False
• A circular motion is an accelerated motion.
  ক

  True

  খ

  False
• M0 L0 T(-1) is an example for ___________
  ক

  Angular displacement

  খ

  Angular velocity

  গ

  Frequency

  ঘ

  Time period
• Motion of the tip of second hand of the clock is an example for ___________
  ক

  Uniform circular motion

  খ

  Projectile motion

  গ

  Motion in a plane with uniform velocity

  ঘ

  Motion in a plane with constant acceleration
• A body is projected horizontally from the top of a cliff with a velocity of 9.8m/s. What time elapses before horizontal and vertical velocities become equal? Take g = 9.8m/s2
  ক

  9.8s

  খ

  0s

  গ

  10s

  ঘ

  1s
• A ball is dropped downward from the roof of a building and simultaneously another ball is thrown in a horizontal direction, when will the balls reach the ground?
  ক

  Same time and same place

  খ

  The first ball will reach later than the second ball

  গ

  The second ball will reach later than the second ball

  ঘ

  Same time but different places
• An object thrown from an aeroplane is an example for ____________
  ক

  Projectile motion

  খ

  Resolution of forces

  গ

  Composition of vectors

  ঘ

  Addition of vectors
• A cyclist moves along a circular path of radius 70m. If he completes one round in 11s, calculate the total length of a path.
  ক

  40m

  খ

  440m

  গ

  0m

  ঘ

  11m
• For motion in two or three dimensions, what is the angle between velocity and acceleration vectors?
  ক

  0°

  খ

  180°

  গ

  Between 0° and 180°

  ঘ

  90°
• A body is moving with a constant acceleration of 11î + 2ĵ, starting from î + ĵ. What will be the position of the body after 10s?
  ক

  551î + 101ĵ

  খ

  550î + 100ĵ

  গ

  100î – 550ĵ

  ঘ

  550î – 550ĵ
• A body is moving with a constant acceleration of 4î + 3ĵ, starting from the origin. What will be the position of the body after 5s?
  ক

  50î + 37.5ĵ

  খ

  37.5î + 50ĵ

  গ

  37.5î – 50ĵ

  ঘ

  50î – 37.5ĵ