A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is

A block of weight 50 kg is placed on a horizontal plane. When a horizo

1.	A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is
A.	17¬∞ 48'
B.	18¬∞ 48'
C.	19¬∞ 48'
D.	20¬∞ 48'
Answer» D. 20¬∞ 48'

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A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is

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