If the man can move the crate, and the tension force is in the cable.
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- 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 leather rein used to fasten the horse to the hitching rail weighs 3.5 oz per foot. The coefficient of static friction between the rail and the rein is 0.6. If a 34-lb force acting on the bridle is sufficient to restrain the horse, determine the smallest safe length L for the free end of the rein.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.
- The normal pressure acting on the disk of the sander is given by p=(4/3)+(r2/6), where p is the pressure in pounds per square inch (psi) and r represents the radial distance in inches. Determine the torque C required to operate the sander at constant speed if the kinetic coefficient of friction for the surface being sanded is 0.86.The screw of the clamp has a square thread of pitch 0.16 in. and a mean diameter of 0.6 in. The coefficient of static friction between the threads is 0.4. Determine (a) the torque C0 that must be applied to the screw in order to produce a 28-lb clamping force at A; and (b) the torque required to loosen the clamp.A 200 lb block is in contact with a plane inclined at 30 degrees to the horizontal. A force P, parallel to and acting up the plane, is applied to the body. If the coefficient of static friction is 0.20, find: a. the value of P to just cause the motion to impend up the plane b. the value of P just to prevent motion down the plane c. the magnitude and direction of the friction force F if P= 80 lbs
- A 6.00 kg block is pressed against a vertical wall by a force. The coefficient of static friction between the block and wall is 0.41 and the directional angle theta for the force is 48 degrees. Determine the magnitude of the force when the block is about to slide down the wall.Part 2 - Two blocks with masses ma = P kg and mB = 100 kg are connected with a flexible cable that passes over a frictionless pulley as shown in Fig. The coefficient of friction between the blocks is 0.2. If motion of the blocks is impending, determine the coefficient of friction between block B and the inclined surface and the tension in the cable between the two blocks Use the last TWO digits of your ID for the force P=24 A 40°2. The 100 – Ib force acts as shown on a 300 - Ib block placed on an inclined plane. The coefficients of friction between the block and the plane are us = 0.25 and Hk = 0.20. Determine whether the block is in equilibrium, and find the value of the friction for the friction force. 300 Ib 100 lb
- A horizontal force of P = 100 N is just sufficient to hold the crate from sliding down the plane, and a horizontal force of P = 350 N is required to just push the crate up the plane. Determine the coefficient of static friction between the plane and the crate, and find the mass of the crate. %3D 30°A steel ramp is used by a worker in a factory to move a cardboard box. The box weighs 40 lb with a center of gravity at point G, the force applied by the worker is parallel to the ramp and the coefficient of friction between the box and ramp is μs = μk = 0.3. Determine the value of the normal force N. Determine the force the worker must apply to slide the box up the ramp. Determine the friction force F acting between the ramp and the box if the worker slid the box up the ramp. Determine the force the worker must apply to slide the box down the ramp. Determine the friction force F acting between the ramp and the box if the worker slid the box up the ramp.Two blocks with masses ma = P kg and mg = 100 kg are connected with a flexible cable that passes over a frictionless pulley as shown in Fig. The coefficient of friction between the blocks is 0.2. If motion of the blocks is impending, determine the coefficient of friction between block B and the inclined surface and the tension in the cable between the two %3D blocks. the force for P is 78kg A B 40°