Motion in a Plane-Practice Questions with Answers & Explanations

Motion in a plane is also called motion in two dimensions.

Examples of motion in a plane include projectile motion and circular motion. For the analysis of such motion, the reference is an origin and two co-ordinate axes: X and Y-axis and scalar and physical vector quantities.

Important Motion in a Plane Questions with Answers

1. When a particle moves in _____, all the three coordinates x, y and z will vary.

  1. one-dimension
  2. two-dimensions
  3. three-dimensions
  4. four-dimensions

Answer: c) Three-dimensions

Explanation: Motion in space that incorporates X-axis, Y-axis and Z-axis is known as three-dimensional motion.

2. Motion of a train along a straight railway track is an example of which type of motion?

  1. Motion in one-dimension
  2. Motion in two-dimension
  3. Motion in three-dimension
  4. None of the above options

Answer: a) Motion in one-dimension

Explanation: The motion of a train along a straight railway track is known as the motion in one dimension.

3. Motion along a straight line is known as ______

  1. Linear motion
  2. Rectilinear motion
  3. Circular motion
  4. Option a and b

Answer: d) Option a and b

Explanation: Motion along a straight line is known as linear motion or rectilinear motion.

4. Choose YES or NO: velocity gives the speed of an object in a particular direction.

  1. YES
  2. NO

Answer: a) YES

Explanation: Velocity is a vector quantity that gives direction as well as magnitude. It describes the speed of an object in a specific direction.

5. Give an example of two-dimensional motion.

An example of two-dimensional motion is the motion of a coin on a carrom board.

6. State true or false: Energy is not conserved in projectile motion.

  1. TRUE
  2. FALSE

Answer: b) FALSE

Explanation: Energy is conserved in a projectile motion.

7. Which of the following is an example of two-dimensional motion?

  1. A bird flying in the sky.
  2. An object falling close to Earth under gravity.
  3. Train moving on a straight railway track.
  4. A downstream or upstream motion of a boat in a river.

Answer: d) A downstream or upstream motion of a boat in a river.

Explanation: Among the given options, a) represents three-dimensional motion, and options b) and c) represent motion in a plane.

8. Fill in the blanks: v=

  1. u+a-t
  2. u+at
  3. u+a+t
  4. u-a-t

Answer: b) u+at

Explanation: v=u+at is the equation of motion in a straight line.

9. Initial velocity of the particle is represented using the alphabet _____

  1. v
  2. s
  3. u
  4. a

Answer: c) u

Explanation: Initial velocity of a particle is represented by ‘u’.

10. Choose YES or NO: Circular motion is an example of motion in two-dimension.

  1. YES
  2. NO

Answer: a) YES

Explanation: Projectile motion and circular motion represent motion in two-dimension.

Practice Questions

  1. Define motion.
  2. What is meant by velocity, acceleration and displacement?
  3. Give the equations for motion in a plane for the y-axis.
  4. What is a projectile motion?
  5. Give three examples of motion in a plane.

Er. Neeraj K.Anand is a freelance mentor and writer who specializes in Engineering & Science subjects. Neeraj Anand received a B.Tech degree in Electronics and Communication Engineering from N.I.T Warangal & M.Tech Post Graduation from IETE, New Delhi. He has over 30 years of teaching experience and serves as the Head of Department of ANAND CLASSES. He concentrated all his energy and experiences in academics and subsequently grew up as one of the best mentors in the country for students aspiring for success in competitive examinations. In parallel, he started a Technical Publication "ANAND TECHNICAL PUBLISHERS" in 2002 and Educational Newspaper "NATIONAL EDUCATION NEWS" in 2014 at Jalandhar. Now he is a Director of leading publication "ANAND TECHNICAL PUBLISHERS", "ANAND CLASSES" and "NATIONAL EDUCATION NEWS". He has published more than hundred books in the field of Physics, Mathematics, Computers and Information Technology. Besides this he has written many books to help students prepare for IIT-JEE and AIPMT entrance exams. He is an executive member of the IEEE (Institute of Electrical & Electronics Engineers. USA) and honorary member of many Indian scientific societies such as Institution of Electronics & Telecommunication Engineers, Aeronautical Society of India, Bioinformatics Institute of India, Institution of Engineers. He has got award from American Biographical Institute Board of International Research in the year 2005.