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Distance And Displacement MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

Quick Facts

  • 17 Questions around this concept.

Solve by difficulty

Calculate the path length of a semicircular path having a radius r

Concepts Covered - 1

Distance and displacement
  1. Position vector

  • The location of a point, in space, is an important physical quantity that is also known as a position vector.

  • Representation of position vector

r=xi^+yj^+zk^

  • Its magnitude is the distance between the initial point (tail) and the final point (head). 

(Generally, we take the initial point as the origin)

  • Its direction is from the initial point and the final point. 

Magnitude of r=x2+y2+z2

 - E.g. If A=3i^4j^+2k^then its magnitude =(3)2+(4)2+(2)2=9+16+4a=29
 

  1. Distance or Path length

  • Length of actual path between the initial and final positions of the body.

  • E.g. Distance traveled along a circle for one complete rotation is 2πr

  • Tips of distance

  1. Distance is a scalar quantity.

  2. It is always positive.

  3. S.I. Unit meter (m).
    Dimension [L]

  4. Distance depends on the path followed by body.  

  1. Displacement

  • The shortest path is between the initial and final position.

  • Tips for Displacement.

  1. Displacement is a vector quantity.

  2. It can be positive, zero or negative.

  3. Displacement is independent of the path.

  4. 4. S.I. unit Meter (m)
     Dimension (L)
     Displacement Distance.
    - E.g. For Semi circle

    Distance =πr while Displacement =2r

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Distance and displacement

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