A boy is pulling a sled with a box (at constant ve- locity) up an inclined surface as shown in Fig. mass of the box and sled is 50 kg; the mass of the boy is 40 kg. If the coefficient of kinetic friction between the sled run- ners and the icy surface is 0.05, determine the minimum coefficient of static friction needed between the boy's shoes and the icy surface. The 25 G. 15
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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.A wedge is used to prop up the 6000-lb block of marble. The wedge angle is =30, and the angle of static friction is s=12 between all contact surfaces. Determine the smallest force P that would prevent the wedge from sliding out.On a runway of a decommissioned airport, a 2000 kg car travels at a constant speed of 100 km/h. At 100 km/h the air drag on the car is 1400 N. Assume that rolling friction is neglie (a) What is the force of static friction exerted on the car by the runway surface, and what is the minimum coefficient of static friction necessary for the car to sustain this spe As, min (b) The car continues to travel at 100 km/h, but now along a path with radius of curvature r. For what value of r will the angle between the static friction force vector and th velocity vector equal 45.00? r = For what value of r will it equal 75.1°? r = What is the minimum coefficient of static friction necessary for the car to hold this last radius of curvature without skidding? As, min = eBook
- The ( 200 N) block shown in Fig. has impending motion up. the plane caused by horizontal force (P) if the coefficient of friction is ( 0.02). Determine the value of force ( P). 200N P 300pls send me answer of this question all the parts pls and i will rate you sure, pls solve a,b,c and d and also a and b A 200-kg dragster (racing car) exerts a constant force of 4000 N during a race. The coefficient of kinetic friction between the tires and the pavement is .15. If the drag strip is 1000 m long, determine:a. The net force on the dragster. b. The acceleration of the dragster. c. The time it takes for the dragster to finish the race.d. The dragster's velocity at the end of the race.The dragster now needs to slow down, so it opens a parachute. The force of air drag is 3500 N. The driver also locks the brakes of the dragster, and the coefficient of kinetic friction becomes .75. Determine:a. How long it will take to stop the dragster.b. The distance the dragster travels while stopping.Q5. What should be the value of the angle 0 in fig. so that the motion of the 90N block impends down the plane? The coefficient of friction u for all the surfaces is 1/3. 3ON SON
- The diagram below represents an elevator used to lift concrete blocks to upper levels on a construction site. The belt travels at a velocity of 0.9 m/s and is inclined at 26° above the horizontal plane. A yolluy € ф 300 mm 008 to NOT TO SCALE alaups 1909 provided to come Calculate the frictional force and the coefficient of friction between each block and the belt. Each block weighs 16.5 kg. Frictional Force: N Coefficient of Friction: ..........2. A 20 kg box sitting on a horizontal surface is pulled by a horizontal force of 64 N. The coefficient of kinetic friction between the box and the surface is 0.2. (Draw free-body diagram here) vsebn lognA en MOIT ANIMAX MATUM70038 blow 10 ode no tos 2010 Owl I 02 sa 0£to shingem seer sosot toriso 21 to obutingam and count onOno gol a. What is the normal force acting on the box?ib et bas 1910 marsib vbod-seil wai(1) b. What is the force of kinetic friction acting on the box? od no oond ton silt ei tad s c. What is the acceleration of the box? rss sdr to noitestsson sdt at tod inTwo blocks are connected by a rope that passes over a frictionless pulley A and a fixed drum B, as shown below. The coefficient of friction between the rope and the drum is 0.3 and between all other surfaces is 0.4. Determine the minimum force P that must be applied to the bottom block to start motion. be a fi Ele Bipaints) B 28° A go 0.4 m 1.8 m 0.8 m org 120 N 220 N ون ang Answers yess Blocky most be slipping Bock within revitslips wh DEXAL.DD Block 1 Block 2 P mor
- • O O O 9:E1 docs.google.com/for O Untitled Section Determine the force P required to lower the 40-kg cylinder at a slow steady speed. The coefficient or friction between the cord and its supporting surface is 0.30. (g = 10 m/s). 40 kg Your answer If (u, = 0.4) then the o between the normal force N and the friction force F will be Your answer العربية الإنجليزيةA man is walking over a dome of 10m radius. How far he can descend from the top of the dome without slipping? Take coefficient of friction between the surface of the dome and shoes of the man as 0.6.Blocks A, B, and C are placed as in Fig. and connected by ropes of negligible mass. Both A and B weigh 25.0 N each, and the coefficient of kinetic friction between each block and the surface is 0.35. Block C descends with constant velocity. (a) Draw separate free-body diagrams showing the forces acting on A and on B. (b) Find the tension in the rope connecting blocks A and B. (c) What is the weight of block C? (d) If the rope connecting A and B were cut, what would be the acceleration of C?