In earlier chapters, we studied motion along a straight line. In this chapter, we study motion in two dimensions, which is called motion in a plane.
When an object moves simultaneously along two perpendicular directions, its motion is said to be in a plane.
The position of a particle in a plane is represented using a position vector from the origin.
Displacement in a plane is a vector quantity that has both magnitude and direction.
Velocity and acceleration in two dimensions are also vector quantities and are obtained by considering motion along x-axis and y-axis separately.
Q1. Motion in a plane is also called: A) One dimensional motion B) Two dimensional motion C) Circular motion D) Linear motion Answer: B Q2. Which of the following is an example of motion in a plane? A) Train moving on straight track B) Falling stone C) Projectile motion D) Lift moving up Answer: C Q3. Position in a plane is represented using: A) Scalar quantity B) Position vector C) Distance D) Speed Answer: B Q4. Displacement in a plane is: A) Scalar B) Vector C) Dimensionless D) Constant Answer: B Q5. Velocity in two dimensions is: A) Scalar B) Vector C) Zero D) Constant Answer: B
Motion involving two perpendicular directions is called motion in a plane or two-dimensional motion.
Position, displacement, velocity and acceleration in a plane are vector quantities.
MCQs are asked on identification of two-dimensional motion and vector quantities.
