5-24. In Fig. P 5-24, the uniform bar A weighs 100 lb and the block B weighs 40 lb. The coefficient of friction for all surfaces of contact is 0.40. Determine the minimum horizontal force which must be applied to B to cause it to move (a) to the left; (b) to the right. B 10 FIG. P 5-24
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- 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 two homogeneous bars AB and BC are connected with a pin at B and placed between rough vertical walls. If the coefficient of static friction between each bar and the wall is 0.25, determine the largest angle 6 for which the assembly will remain at rest.
- The square-threaded screw with a pitch of 10 mm and a mean radius of 18 mm drives a gear that has a mean radius of 75 mm. The static and kinetic coefficients of friction between the gear and the screw are 0.12 and 0.06, respectively. The input torque applied to the screw is C0=10Nm. Assuming constant speed operation, determine the output torque C1 acting on the gear.A 4285 block is held in horizontal position as shown by a wedge at B. If the coefficient of friction between the block & the wedge is 0.25 and that between the wedge & the floor is 0.3, is the wedge self-locking?a. self-locking b. not self-locking c. cannot be determinedHello good evening, Permission, i have a question in my homework. The following bellow is question. Please advice. Thank you Regards,Irfan A 50 kg cabinet is mounted on casters that can be locked to preventtheir rotation. The coefficient of static friction between the floor and each caster is 0.30 and h = 80 cm. Assuming that the casters at both A and B are locked, determine :(a) the force P required to move the cabinet to the right,(b) If wheel A is locked and wheel B is free to turn without turning
- Two blocks A and B meet incontact as shown in the figure. If hecoefficients of static friction for allthe surfaces in contact is 0.2,Determine whether the 50-lb force moves theblock A up, keep balance,or move block A down,shifting block B to the right.Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. Determine the force Q required to lift the 92-kg steel crate which rests against a 5° - wedge on a side and brick wall on the other side. The coefficient of frictions between the crate and wedge, wedge and surface, crate and surface are 0.45, 0.35, and 0.38, respectively. Use g=9.806 m/s2. Please, answer as soon as possible. Thank you.A 50 kN block is resting on a horizontal plane with a coefficient of statics friction of 0.3. Determine the minimum force P to start the motion of the block to the right, if it is applied on the block: a. Horizontally to the right. Ans: 15kN b. Downward to the right, 30° with the horizontal Ans: 20.95KN
- A box of mass m = 30 kg is at rest on a ramp inclinedat 50° to the horizontal. The coefficients of friction between the box and the ramp are mS = 0.80 and mK = 0.70. Determine the magnitude of the largest force that can be applied upward, parallel to the ramp, if the box is to remain at rest.The slender, uniform bar BC with a mass of 6 kg rests on the center of the 300x200 mm block of mass 3 kg. The friction coefficients at the contact points are: μA = 0.4; µB = 0.6; µC = 0 . Determine the greatest moment M that can be applied to the bar without generating movement in it.A 0.8 lb roll of paper is suspended from a wire hanger so that it rests against the wall. The hanger has a negligible weight and the bearing O can be considered as frictionless. The two ends of the hanger can be treated as pin joints. Determine the force P required to start turning the roll if theta = 37 degrees and the coefficient of static friction is 0.29.