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An object of mass 10kg is connected to t...

An object of mass 10kg is connected to the lower end of a massless string of length 4m hanging from the ceiling. If a force F is applied horizontally at the mid-point of the string, the top half of the string makes an angle of `45^(@)` with the vertical , then the magnitude of F is

A

75N

B

90N

C

100N

D

70 N

Text Solution

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The correct Answer is:
C
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