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When a girl moves towards a plane mirror at a speed of 4.0m/s, the distance between the ...

When a girl moves towards a plane mirror at a speed of 4.0m/s, the distance between the girl & her image reduces a speed of
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  • A 2 m/s
  • B 4 m/s
  • C 8 m/s
  • D 12 m/s
Correct Answer: Option C
Explanation:
v
=
d
t
or
v
α
d

d = x, v = 4m/s
d = 2x, v = ? (girl & image)
v
=
2 × 4
x
=
8
m
s

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