JEE Advanced Model Paper 4 with solutions for online practice

→

v0

= velocity of object = −2

^

i

ms−1

→

vm

= velocity of mirror = −2

^

i

ms−1
m =

f

f−u

=

−20

−20−(−30)

= -2
For velocity component parallel to optical axis,
(v1∕m)∕/ = −m2(v0∕m)∕/
(v1∕m)∕/ = −(−2)2 11

^

i

= −44

^

i

ms−1
For velocity component perpendicular to optical axis
(v1∕m) = (v1∕m)∕/ + (v1∕m)⊥ = (−44

^

i

−24

^

j

)ms−1
Also , (v1∕m) =

→

v1

−

→

vm

Or

→

v1

= (v1∕m) +

→

vm

= (−44

^

i

−24

^

j

) - 2

^

i

= (−46

^

i

−24

^

j

)ms−1