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Q.

Velocity of a particle of mass 2 kg changes from  V1=2i^2j^  m/s to V2=i^j^  m/s  after colliding with a plane friction less surface. Choose the correct  option(s) regarding this collision:

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a

A) The angle made by the plane surface with the positive x-axis is 900+tan1(13)

b

The angle made by the plane surface with the positive x-axis is  tan1(13)

c

The direction of change in momentum of the particle makes an angle tan1(13) with the positive x-axis.

d

The direction of change in momentum of the particle makes an angle  900+tan1(13) with the plane surface.

answer is A, C.

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Detailed Solution

 N^=v2v1|v2v1|=3i+j10
Angle b/w N^ and x-axis
cosϕ=i^.   N^=310
tanϕ=13
Question Image
angular b/w plane surface and +x axis =90+ϕ .
 

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