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Class 11 NEET Physics Laws of Motion Questions
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© examsnet.com
Question : 19
Total: 75
Two stones of masses
m
and
2
m
are whirled in horizontal circles, the heavier one in a radius
r
2
and the lighter one in radius
r
. The tangential speed of lighter stone is
n
times that of the value of heavier stone when they exprience same centripetal forces. The value of
n
is
[NEET 2015]
4
1
2
3
Validate
Solution:
According to question, two stones experience same centripetal force i.e.
F
C
1
=
F
C
2
or
m
v
1
2
r
=
2
m
v
2
2
(
r
∕
2
)
⇒
V
1
2
=
4
V
2
2
So,
V
1
=
2
V
2
i.e.,
n
=
2
© examsnet.com
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