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Manipal Entrance Test 2013 Physics Paper
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© examsnet.com
Question : 41
Total: 60
If the length of a penduleum is made 9 times and mass of bob is made 4 times, then the value of time period becomes
3 T
3
2
T
4 7
2 T
Validate
Solution:
The periodic-time of a simple pendulum is given by
T
=
2
π
√
l
g
T
1
=
T
,
l
1
=
l
,
l
2
=
9
l
T
1
T
2
=
√
l
1
l
2
=
√
1
9
=
1
3
T
2
=
3
T
1
=
3
T
© examsnet.com
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