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NEET 2018 Physics and Chemistry
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© examsnet.com
Question : 29
Total: 90
A solid sphere is in rolling motion. In rolling motion of body possesses translational kinetic energy
(
K
t
)
as well as rotational kinetic energy
(
K
r
)
simultaneously.The ratio
K
t
:
(
K
t
+
K
r
)
for the sphere is
[NEET 2018]
7
:
10
5
:
7
2
:
5
10
:
7
Validate
Solution:
👈: Video Solution
K
t
=
1
2
m
v
2
K
t
+
K
r
=
1
2
m
v
2
+
1
2
I
ω
2
=
1
2
m
v
2
+
1
2
(
2
5
m
r
2
)
(
v
r
)
2
=
7
10
m
v
2
So,
K
t
K
t
+
K
r
=
5
7
© examsnet.com
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