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Question
Physics
A particle describes a horizontal circle in a conical funnel whose inner surface is smooth with the speed of 1 ms- 1 . What is the height (in cm ) of the plane of the circle from the vertex of the funnel? (g = 10 m s- 2)
Q. A particle describes a horizontal circle in a conical funnel whose inner surface is smooth with the speed of
1
m
s
−
1
. What is the height (in
c
m
) of the plane of the circle from the vertex of the funnel?
(
g
=
10
m
s
−
2
)
46
122
NTA Abhyas
NTA Abhyas 2022
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Answer:
10
Solution:
N
s
in
θ
=
m
g
N
cos
θ
=
m
v
2
/
r
Dividing above equations
⇒
t
an
θ
=
r
g
/
v
2
⇒
h
r
=
v
2
r
g
⇒
h
=
g
v
2
=
10
c
m