Four particles are moving with different velocities in front of stationary plane mirror (lying in y-z plane). At t = 0, velocity of A is 
. Velocity of B is 
, velocity of C is 
, velocity of D is 
. Acceleration of particle A is 
and acceleration of particle C is 
. The particle B and D move with uniform velocity (Assume no collision to take place till t = 2 sec). All quantities are in SI. units. Relative velocity of image of object B with respect to object A is denoted by 
. Velocity of images relative to corresponding objects are given in column-I and their values are given in column-II at t = 2 second. Match column-I with corresponding values in column-II.
Column I | Column II |
(i) | [A] 2i |
(ii) | [B] –6i |
(iii) | [C] –12i + 4j |
(iv) | [D] –10i |
(v) | [E] perpendicular to the plane of mirror |
Text Solution
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Ans.
(i) [D,E]
(ii)[A,E]
(iii)[D,E]
(iv)[B,E]
Sol.
= i + (2i + j) (2) = 5i + 2j
= – 5i + 
So 
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