A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is . The effort applied parallel to the plane is given by

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1.	A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is . The effort applied parallel to the plane is given by
A.	P = W tan
B.	P = W tan ( + )
C.	P = W (sin + cos )
D.	P = W (cos + sin )
Answer» D. P = W (cos + sin )

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