6. The crate in Figure 3.7 has a mass 350 kg and is subjected to a towing force P acting at an angle 01 = 20° with the horizontal. If the coefficient of static friction is 0.5, determine the magnitude of P to just start the crate moving down the plane. 02 = 10° 0, Figure 3.7 P=986.61N
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- Calculate the horizontal force P required to push the 85-lb lawn mower at constant speed. The center of gravity of the mower is at G, and the coefficients of rolling resistance are 0.12 for the front wheels and 0.18 for the rear wheels.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 single-threaded screw of the floor jack has a pitch of 0.5 in. and a mean radius of 1.75 in. The angle of static friction is 8.5. (a) Determine the couple C that must be applied to the screw to start lifting a weight of 4000 lb. (b) What is the couple required to start lowering the weight?
- The brake pads at C and D are pressed against the cylinder by the spring BF. The coefficient of static friction between each pad and the cylinder is 0.15. Find the smallest tension in the spring that would prevent the cylinder from rotating when the clockwise couple M=2200lbin. is applied. Neglect the weights of the members.The 40-lb spool is suspended from the hanger GA and rests against a vertical wall. The center of gravity of the spool is at G and the weight of the hanger is negligible. The wire wound around the hub of the spool is extracted by pulling its end with the force P. If the coefficient of static friction between the spool and the wall is 0.25, determine the smallest P that will extract the wire.1.The figure shows 3 blocks. Block C hangs from a rope which passes through a fixed cylinder and is attached to block B. Find the maximum mass of block C so that block B does not move to the right. Take into account that there are frictional forces at all points of contact. Consider the given values of the masses and , the coefficient of static friction between surfaces µ1 and the coefficient of friction static between the cylinder and the uC chord. Here are the values: ma= 72 kg mb= 62 kg u1= 0,47 uC=0,37
- The crate in Figure 3.7 has a mass 350 kg and is subjected to a towing force P acting at an angle θ1 = 20° with the horizontal. If the coefficient of static friction is 5, determine the magnitude of P to just start the crate moving down the plane. θ2 = 10° answer=986.61NThe uniform rod has a mass of 10 kg and rests on the inside the smooth ring at B and on the ground at A as shown in Figure Q3. Calculate the friction of static friction between the rod and the ground if the rod is on the verge of slipping. 0.5 m 0.2 m 30 A Figure Q3estion 6 The crate has a weight of 490 lb and a center of gravitY at G rests on the floor for which the coefficient of static friction is equal to 0.3. if the force P=200 lb is applied as shown in the figure below, The force of friction developed between the crate and the ground is. yet aered ered out of L00 Flar -2 ft 2 ft- 3 4 ft 3 ft Figure 1
- The crate has a weight of 490 lb and a center of gravity at G rests on the floor for which the coefficient of static friction is equal to 0.3. If the force P = 200 lb is applied as shown in the figure below. The force of friction developed between the crate and the ground is. -2 ft --2 ft- 4 ft 3 ft A. Figure 1 Select one: a. 601 lb b. 610 lbThe uniform cylindrical drum weighs 250 lbs and is supported by a frictionless roller at A and the frame at C. The coefficients of friction between the frame and the drum at C are as follows, static coefficient u: = 0.3 and kinetic coefficient uk = 0.25. If the drum is at rest, find M required to start the drum moving? For full credit show a labeled free-body diagram. 2' 30°The crate has a weight of 490 lb and a center of gravity at G rests on the floor for which the coefficient of static friction is equal to 0.35. If the force P = 300 lb is applied as shown in the figure below. The static friction force developed between the crate and the ground is. -2 ft. 2 ft -2 ft- 2 ft 4 ft 3 ft A Figure 1 Select one: O a. 234.5-Ib O b. 300-lb O c. 240-lb O d. 610 lb 3.