Arectangular body is held at rest by pressing \it against a vertical wall for which u < 1. Which of the following is generally true? It will be easier to hold the body if the surfaces in contact are smooth. Pressing force required is smaller than weight mg of the body Pressing force required is greater than weight mg of the body The required pressing force is independent of the coefficient of friction between surfaces in contact.

Arectangular body is held at rest by pressing \it against a vertical

1.	Arectangular body is held at rest by pressing \it against a vertical wall for which u < 1. Which of the following is generally true? It will be easier to hold the body if the surfaces in contact are smooth. Pressing force required is smaller than weight mg of the body Pressing force required is greater than weight mg of the body The required pressing force is independent of the coefficient of friction between surfaces in contact.
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