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Motion in a Plane

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    Motion in two dimensions is sometimes known as motion in a plane. Circular motion, projectile motion, and so on. The reference point for such motion analysis will be made up of an origin and the two coordinate axes X and Y.

    Because a plane is made up of only two dimensions, motion in a plane refers to motion in two dimensions. In light of the foregoing, we consider two axes – the X-axis and the Y-axis, respectively. We need to know about motion in one direction to determine the equation of motion in a plane.

    A Brief outline

    • Motion in a plane is defined as a body moving from one point to different points on the X and Y axes. The X and Y axes make up a plane, and if we measure the distance travelled along the X-axis and the time it takes for a body to move along the vertical or Y-axis, we can calculate velocity by dividing the distance travelled by the time it takes.
    • Similarly, the product obtained by charting the velocity along the X-axis and the time along the Y-axis is the body’s acceleration.
    • Instances of 2-D motion in a plane.
    • Hitting a cricket ball or a cannonball.
    • The movement of a billiard ball and the billiard table’s floor.
    • A boat moving downstream or upstream in a river.
    • The Earth circularly revolves around the Sun.
    • A bullet’s projectile motion when fired from a gun.
    • One of the best instances of object-bearing motion in a plane is projectile motion.

    Important concepts

    Understanding motion in one dimension and the underlying motion parameters in depth is required to comprehend motion in a plane.


    It is a total body measurement that is determined from the place where an object begins its journey to the point where it ends it. We won’t know which direction we’re traveling by train because it’s a scalar physical quantity; all we’ll know is the distance we completed from Delhi to Bangalore.


    Because we move with time, one factor that can be used to determine an object’s velocity and acceleration is time; however, because time is a scalar variable, we only know the time we will arrive in Delhi.


    The magnitude and direction of a moving object are described by velocity, which is a physical quantity. A velocity shows how an object’s position can be described as the rate of change of its position about a reference frame and time. Well! Because velocity is the speed of an object in a certain direction, it may appear difficult.

    Displacement is likewise a physical quantity representing the amount and direction of a body’s motion; nevertheless, it is the shortest distance a body may travel to reach another point.

    In a plane, we must use identical equations in both directions: the Y-axis and the X-axis.

    Significance of motion in a plane in NEET exam

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    One of the most frequent types of motion in a plane is projectile motion. The only acceleration acting in projectile motion is in the vertical direction, which is gravity’s acceleration (g). As a result, to obtain the unknown parameters, the equations of motion can be applied individually in the X-axis and the Y-axis. One-dimensional motion occurs when an object moves in a straight path regardless of direction. Two-dimensional motion occurs when an item moves in x and y coordinates at a constant velocity. Accelerated motion is defined as a steady rise in velocity over time. Oscillatory motion is an object’s to and fro movement around its mean location.

    Frequently asked questions

    Question 1: What is Class 11 Motion in a Plane?

    Answer: Motion on a Plane, Class 11, is covered in Chapter 4 of Physics. Motion in two dimensions is defined as motion in a plane. Projectile motion and circular motion are two examples. An origin and two co-ordinate axes, namely the X and Y-axis, as well as scalar and vector physical quantities, are used to analyze such motion.

    Question 2: Can you give me an example of plane motion?

    Answer: We can derive equations for an object’s motion along the axis or in two dimensions from its motion in a plane. For the X-axis, use the following formula: Projectile motion is among the most common types of plane motion. The only acceleration acting on the item in the vertical direction in a projectile motion is the acceleration due to gravity (g), which is 9.8 ms2.

    Question 3: How Do We Research Plane Motion?

    Answer: Vectors, projectile motion, displacement, acceleration, time, relative motion, and many other physical quantities are used to investigate motion in a plane. In a plane, the same equations of motion are applied individually.

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