A uniform ladder of length 3.25 m and weighing 250 N is placed Against a smooth vertical wall with its lower end 1.25 m from theWall. The coefficient of friction between the ladder and floor is0.3. The frictional force acting on the ladder at the point of contact With floor is N.
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- A 150 lb man can climb up15 ft on a 20 ft ladder before it slips. What must the coefficient of friction be if the ladder is arranged so that its base makes an angle of 50 ̊ with the ground? Assume the ladder to be uniform and weighing 100 lb.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 100-N crate is sitting on a 200-N crate as shown The rope that joins the crates passes around in Fig. a frictionless pulley and a fixed drum. The coefficient of friction is 0.30 at all surfaces. Determine the minimum force P that must be applied to the 200-N crate to start motion. F12m 0.5 m 30 100 N 2.5 m 200 N P
- A string passes over the top of a fixedcylinder of radius R = 10 cm. One end of the string is attached to a mass m =10 kg, the other end is attached to a mass M. The coefficient of static frictionbetween the string and cylinder is μ = 0.45. Determine maximum andminimum possible values for M so that the string does not slide over thecylinder.Q2 (a) Discuss briefly the various types of friction and explain your classification. (b) A body resting on a 15° inlined plane required a pull of 2400N to move. If the body resting on a 20° inlined plane, required a pull of 2000N force for it to move. If both forces are acting parallel with the inclined plane, find: (i) coefficient of friction, (ii) weight of the bodybody resting on a rough horizontal plane requires a pull of 300 N inclined at 40º to the horizontal plane just to move it. It is found that a push of 150 N inclined at 40o to the x-axis can also make the body to move. Determine the weight of the body and the coefficient of friction.
- 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°A block of mass M1 resting on an inclined plane is connected by a string and pulleys to another block of mass M2 as shown in Fig. Find the tension in the string and acceleration of the blocks. Assume the coefficient of friction between the blocks M1 and the plane to be 0.2. M1=1500N , M2=1000N . Angle of inclined glane = 45 degreesA uniform ladder of length 12 mand mass 30 kg rests with one ed on rough horizontal ground and the other end against a smooth vertical wall. The ladder is indined 65°. The coefficient of friction, H, between the ladder and the ground is 0.35. A woman of mass 65 kg is slowly dimbing up the ladder. She wants to know how far up the ladder she can dimb safely. Drawa diagramshowing all the force adting on the ladder when the woman is x metres fromthe foot of the ladder. (a) (b) Find the reaction of the ground on the ladder. (c) Show that the reaction of the wall on the ladder is less than 33.25g By taking moments about the base of the ladder, find how far up th ladder she an dimb safely. (d)
- 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. 15A 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.A 8.0 m long ladder AB leans against a smooth wall making an angle of 70º with the floor. The ladder is uniform and has a mass of 40.0 kg.(a) Determine the forces exerted on the ladder by the floor and the wall (i.e. at A and B respectively).(b) Determine the minimum value of the coefficient of static friction to prevent the ladder from slipping.