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Manipal Entrance Test 2014 Physics Paper
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© examsnet.com
Question : 10
Total: 60
A body A of mass 1 kg rests on a smooth surface. Another body B of mass 0.2 kg is placed over A as shown. The coefficient of static friction between A and B is 0.15. B will begin to slide on A, if A is pulled with a force greater than
1.764 N
0.1764 N
0.3 N
It will not slide for any F
Validate
Solution:
B
will begin to slide on
A
, if pseudo force is more than limiting friction
F
>
F
1
⇒
m
(
F
m
+
M
)
>
µ
s
R
⇒
m
(
F
m
+
M
)
>
0.15
mg
∴
F
>
1.764
N
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