The doorstop is inserted with a rightward horizontal force of 30lb. If the coefficient of static friction for all surfaces is µs=0.20, Door 30 lb 10° What is the normal force between the doorstop and the floor?
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- A 98N force is needed to push a 45kg box across the wooden floor. What is the value of the coefficient of static friction across the floor and the box? O 0.212 O 0.222 O No answer O 0.122 O 0.012I 00LLJ408 - Go.. Question Info and Solutions Blocks A and B of mass 5 kg and 10 kg respectively are placed on a Smooth inclined plane of Inclination 30, as shown. Block A and B are subjected to forces 5 N And 50 N respectively along the incline, as shown. The coefficient of friction between A andBis 0.50 find the frictional force between A and B in N is: (g= 10 ms SOH 300 Options Solution Fs=Static frictional force umg cos 30 (0.5) (5) (10) cos 30 21.6 N Let a be the acceleration of both the blocks along 5.27 PMCables are knotted at O. Determine the tension in Cable OC. C(-3,-4,12) ft z а 19101b c 6.06 lb b 6280 lb d 195 lb Determine the tension in Cable OA. а 1930 Ib b 45.0 lb c 60.0 lb d 489 lb В Determine the tension in Cable OB. а 45.01b b 60.0 lb 180 lb c 1450 lb d 589 lb
- SAQ 1 1.2 m D 80 kN m An 80-kn. m couple shown in the plate is caused by a pair of parallel forces of magnitude F (not shown). 1.6 m Determine: a) the smallest possible value of F, and b) the value of F if the forces act at points A and C and are parallel to the dashed line shown at A. А В 60°While digging a small hole prior to planting a tree, a homeowner encounters rocks. If he exerts a horizontal 239-N force on the prybar as shown, what is the horizontal force exerted on rock C? Note that a small ledge on rock C supports a vertical force reaction there. Neglect friction at B. Complete solutions (a) including and (b) excluding the weight of the 17-kg prybar. A 239 N 1550 mm 16° B 230 mm Answers: (a) Including weight, Fc- i (a) Excluding weight, Fe- i NA 45 kg box is at rest at one end of a 2 meter board. That end of the board is slowly raised at an incline until the box starts to slide. At that point, the angle is at 34 degrees. The coefficient of kinetic friction is 0.50N. Please help me calculate the coefficient of static friction between both the box and the board?
- Q 3: of the forces system in the figure below . Determine the resultant moment a bout point o E. 300 N 1 m VP= 40ON Q4: For the forces system in figurel if the resultant mom ent aboul point A is equal to (Zero) find magnit ude of the force p. the A Q= 650 N 0.2 102 ml MA = 0.0 = Z Fd %3DProblem 2: Determine the force P necessary to start the V-shaped wedge to the right if the coefficient of friction is f= 0.445 at each of the three surfaces of contact. Wg =1000N WA =200N в P- 30° 150Ed and Al are pushing on a couch as shown in the picture and it doesn't slip. EC Ec Ed is pushing with a force of 362.8 N at an angle of 0 = 50.3 degrees with respect to the vertical and Al is pushing with a force of 126.8 N at an angle of o = 29 degrees with respect to the horizontal. If the couch has a mass of 98 kg and the coefficients of static and kinetic friction between the couch and the floor are ug = 0.52, and u = 0.39, what is the magnitude of the force of friction exerted by the floor on the couch? Click here for a hint F =
- Timmy is done placing his things in a big box and ready to transfer to his new condo unit. The movers arrived and uses a wooden ramp with an elevation of 24.6° from the horizontal to load his things to the truck. If the box has a mass of 45.7kg and has a value of coefficient static friction is 0.936. How much force is required for the delivery man to overcome the static friction? O 568.16 N O 385.14 N O 381.54 N O No answer O 586.16 N(a) Calculate the tension (in N) in a vertical strand of spiderweb if a spider of mass 5.00 x 10¯º kg hangs motionless on it. (Enter a number.) N (b) Calculate the tension (in N) in a horizontal strand of spiderweb if the same spider sits motionless in the middle of it much like the tightrope walker in the figure. 5.0° 5.0° T. w T. TR The strand sags at an angle of 12.0° below the horizontal. (Enter a number.) N Compare this with the tension in the rtical strand (find their ratio). (Enter a number.) (tension in horizontal strand) / (tension in vertical strand)moodle.nct.eduom/mod/qi -Learning Portal Courses - Reports - e-Services- Academic Departments - ETC - CIMS - A 17kg crate resting on a horizontal surface is pushed as shown. If the coefficient of static friction u, between the surfaces is 0.24, what is the minimum force (F) required to start the motion? O a 4.08N O b. 70.83N Oc 39.98N Od. 694.17N Windows buut An object of mass Skg is sliding with a constant velocity of 10m/s on a frcitionless horizontal table. The force needed to keep the object moving with the same velocity is. 144 4- # 4. 6. V.