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KVPY SX SB Exam 2016 Question Paper
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© examsnet.com
Question : 22
Total: 120
Uniform ring of radius R is moving on a horizontal surface with speed v and then climbs up a ramp of inclination 30º to a height h. There is no slipping in the entire motion. Then h is
v
2
2
g
v
2
g
3
v
2
2
g
2
v
2
g
Validate
Solution:
Using conservation of energy
1
2
m
v
2
+
1
2
m
R
2
(
v
R
)
2
=
m
g
h
m
(
v
2
2
+
v
2
2
)
=
m
g
h
h
=
v
2
g
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