02 A block of 15 kg was place on an indined surface as shown in Figure 2. If the static coefficient of friction between the block and the surface is 03, findt ta) the maximum friction force. (b) the equilibrium state of the bleck. 15 kg Figure 2:
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- A 1.1-kg disk A is placed on the inclined surface. The coefficient of static friction between the disk and the surface is 0.35. Is the disk in equilibrium if P=5.5N and =30?The coeffient of static friction between the uniform bar AB of weight W and the ground is 0.45. Find the smallest angle and the corresponding force P that would initiate simultaneous tipping and sliding of the bar.Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair is denoted by G. The coefficient of static friction is 0.2 at B (the contact point between the chairs) and 0.35 at A, C, and D. Determine the smallest force P that would cause sliding.
- The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the smallest force P and the corresponding angle that would cause impending sliding of the block. The angle of static friction between the block and the ground is s.The bar ABC is supported by three identical, ideal springs. Note that the springs are always vertical because the collars to which they are attached are free to slide on the horizontal rail. Find the angle at equilibrium if W = kL. Neglect the weight of the bar.Problem 4. A.) If the uniform concrete block has a mass of 500 kg, determine the smallest horizontal force P needed to movethe wedge to the left. The coefficient of static friction between the wedge and the concrete and the wedge and the floor is 0.3. The coefficient of static friction between the concrete and floor is 0.5.ANSWER: P=1797.52; N=1.80kNB.)Refer to problem number 4. Calculate the followinga.) the angle of friction between the wedge and the concrete and the wedge and the floor.Answer: ?????? ??? ????????= ?????? ??? ?????= 16.7ob.) the coefficient of static friction between the concrete and floor.Answer: ????????? ??? ?????= 263.56o
- Two blocks A and B of mass 200 kg and 100 kg respectively are placed in contact with each other as shown in Figure 2. The coefficient of friction between all contacting surfaces is μ = 0.3. Determine the minimum force required to maintain equilibrium.A)What force F is needed to get the 300kg block shown in the figure below to move to the right? (b) What is the frictional force developed between the two blocks in N? (c) What is the frictional force developed between the 300kg block and the ground surface in N? The coefficient of static friction for all surfaces is 0.3. The angle, theta=100 The force F = N The frictional force between the two blocks = The frictional force between the 300kg block and the ground=An 800 N-m couple is applied to the flywheel as shown. The coefficient of belt friction is 0.20. The minimum force P required to prevent rotation of the flywheel is applied. a.) Which Tension is larger, Ta or Tb? Explain b.) What is the angle of contact in radians? c.) What is the value of the ratio Ta/Tb? Please answer these , with FBD and solutions please.
- A small block of weight W is placed on a plane inclined at an angle θ to the horizontalThe coefficient of friction between the block and the plane is μi) When θ is 20O the block is in limiting equilibrium. Find μii) When μ = 1/3 and is 30o a horizontal force of 6N is required to prevent theblock from slipping down the plane. What is the weight of this block?iii) A force of 10N up the pane causes the bock to be on the point of sliding up If W = 20N and μ is ¼, find θiv) If θ is 40o and μ is 0.5 find the magnitude and direction of the least force required to prevent the block from sliding down the plane when W = 12NOne end of a uniform meter stick is placed against a vertical wall. The other end is held by a lightweight cord that makes an angle ? with the stick. The coefficient of static friction between the end of the meter stick and the wall is us =0.40. B. A block of the same weight as the meter stick is suspended from the stick, as shown, at a distance x from the wall. Assume that angle ? = 15° in this problem. What is the minimum value of x for which the stick will remain in equilibrium? C. When angle ? = 15°, how large must the coefficient of static friction be so that the block can be attached 0.10 m from the left end of the stick without causing it to slip?Q 40/A homogeneous bar of length / and weight w lb rests horizontally as shown in Fig. 40 with its free endon a block of weight W. the block W is at rest on a plane inclined at the angle a with the horizontal. Determine the necessary coefficient of friction u between the block and the plane for equilibrium. Assume no friction between the bar and the block.