Test 1

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1. A block of mass m is resting on an inclined plane. The coefficient of friction between the block and the plane is 0.25. Determine the maximum value of the inclining angle?

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  14.03                 0.25                 Explain

 

2. A ladder of weight 60 Nt leans against a frictionless wall. The other end of the ladder is on a floor where the coefficient of static friction is 0.3. If the bottom of the ladder is located 3 meters from the wall and the length of the ladder is 5 meters, find the magnitude and direction of all forces, other than the weight, acting on the ladder.

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Solution

 

3. What is the maximum distance at which the bottom of the ladder in the problem above can be placed away from the wall before the ladder slips?

 

Solution

 

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