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KVPY SA Exam 2011 Question Paper
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© examsnet.com
Question : 17
Total: 80
A small child tries to move a large rubber toy placed on the ground. The toy docs not move but gets deformed under her pushing force
(
→
F
)
which is obliquely upward as shown. Then
the resultant of the pushing force
(
→
F
)
, weight of the toy, normal force by the ground on the toy and the frictional force is zero
the normal force by the ground is equal and opposite to the weight of the toy
the pushing force
(
→
F
)
of the child is balanced by the equal and opposite frictional force
the pushing force
(
→
F
)
of the child is balanced by the total internal force in the toy generated due to deformation
Validate
Solution:
∵
∑
F
ext
=
0
∴
a
system
=
0
© examsnet.com
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