In block brake, the normal reaction and frictional force act at the m – McqOptions

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1.	In block brake, the normal reaction and frictional force act at the mid-point of the block. This is true only if the angle of contact is ____
A.	less than 45 degree
B.	less than 60 degree
C.	greater than 45 degree
D.	greater than 60 degree
Answer» B. less than 60 degree

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