The crate, which has a mass of 140 kg, is subjected to the action of the three forces shown in the figure. If it is originally at rest, determine the friction force when P1 = 750 N, P2 = 900 N, P3 = 500N and 0 = 25°. Assume the coefficient of kinetic %3D %3D friction between the crate and the surface is Hk = 0.40. %3D P2 P1 3. P3
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- Repeat Prob. 4.152 assuming that the 400-kN force is applied at O instead of L.A 6-m long ladder has a mass of 16 kg, and its center of gravity is 2.4 m from the bottom along the ladder. The ladder is resting on a 5° upward sloping floor at A and on a wall inclined to the right at 5° from the vertical at B, so that it makes an angle of 60° with the horizontal.How far up along the ladder can a 79-kg man climb before the ladder is on the verge of slipping? The angle of friction at all contact surfaces is 15°. Also determine the total reaction at A and B in Newton. Note: Point A is at the left of point B.A 6-m long ladder has a mass of 10 kg, and its center of gravity is 2.4 m from the bottom along the ladder. The ladder is resting on a 5° upward sloping floor at A and on a wall inclined to the right at 5° from the vertical at B, so that it makes an angle of 60° with the horizontal. How far up along the ladder can a 78-kg man climb before the ladder is on the verge of slipping? The angle of friction at all contact surfaces is 15°. Also determine the total reaction at A and B in Newton. Note: Point A is at the left of point B. SOLVE ASAP
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