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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 α. The effort applied parallel to the plane is given by$ |
A. | P = W tanα |
B. | P = W tan (α + ɸ) |
C. | P = W (sinα + μ cosα) |
D. | P = W (cosα + μ sinα) |
Answer» D. P = W (cos‚âà√≠¬¨¬± + ‚âà√≠¬¨‚à´ sin‚âà√≠¬¨¬±) | |