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Static friction is noted to as the force-create in the middle of paired objects when single object…

4. A uniform ladder of mass (m) and length (L) leans against a frictionless wall, see figure. If the coefficient of static riction between the ladder and the ground which the ladder will not slip? is 0.46, what is the minimum angle (0) between the ladder and the floor at degrees ssf60 ssf6ds < 60 ssf60 ssf60 ssf60 ssf60 ssf60 ssí ssf60 ssf60 ssf60 ssf60 sf60 ssf60 ssf6mm ssfórssf60 ssf60 ssf60 ssf60 ssf60 ss $5/60 ssf60 ssf60 ssf60 ssf6 ssf60 ssf60 ssf60 f60 ssf60 ssf60 ssf60 ssf60 ssf60 s

4. A uniform ladder of mass (m) and length (L) leans against a frictionless wall, see figure. If the coefficient of static riction between the ladder and the ground which the ladder will not slip? is 0.46, what is the minimum angle (0) between the ladder and the floor at degrees ssf60 ssf6ds < 60 ssf60 ssf60 ssf60 ssf60 ssf60 ssí ssf60 ssf60 ssf60 ssf60 sf60 ssf60 ssf6mm ssfórssf60 ssf60 ssf60 ssf60 ssf60 ss $5/60 ssf60 ssf60 ssf60 ssf6 ssf60 ssf60 ssf60 f60 ssf60 ssf60 ssf60 ssf60 ssf60 s

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter8: Rotational Equilibrium And Rotational Dynamics

Section: Chapter Questions

Problem 30P

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A painter of mass 87.8 kg is 1.45 m from the top of a 6.67-m ladder. The ladder rests against a wall. Friction between the ladder and the wall is negligible. The ladders mass is 5.50 kg. Assume the ladder is set up according to Occupational Safety and Health Administration standards so that it makes a 75.5 angle with the floor. a. What is the minimum coefficient of static friction required for the painters safety? b. Would rubber ladder tips on dry concrete be safe?
A 15.0-m uniform ladder weighing 500 N rests against a frictionless wall. The ladder makes a 60.0 angle with the horizontal. (a) Kind the horizontal and vertical forces the ground exerts on the base of the ladder when an 800-N firefighter has climbed 4.00 m along the ladder from the bottom. (b) If the ladder is just on the verge of slipping when the firefighter is 9.00 m from the bottom, what is the coefficient of static friction between ladder and ground?
A 20.0-kg horizontal plank 4.00 in long rests on two supports, one at the left end and a second 1.00 m from the right end. What is the magnitude of the force exerted on the plank by the support near the right end? (a) 32.0 N (b) 45.2 N (c) 112 N (d) 131 N (e) 98.2 N
3. A uniform ladder of mass (m = 13.0 kg) and length (L) leans against a frictionless wall, see figure. If the angle 8 68.0°, find the static friction force between the ladder and the floor when a 85.0-kg person stands one- = third of the way up the ladder? N A L Ꮎ
Problem Solving 4: Ladder A 5.0-m-long ladder leans against a wall at a point 4.0 m above a cement floor as shown. The ladder is uniform and has mass frictionless, but the floor is not, determine the forces exerted on the ladder by the floor and by the wall. m = 12 kg . Assuming the wall is L. Fw 4.0 m Fcy mg FCx
and 7. A uniform ladder of mass (m) and length (L) leans against a frictionless wall, see figure. If the coefficient of static friction between the ladder and the ground is 0.48, what is the minimum angle (0) between the ladder and the floor at which the ladder will not slip? degrees 2 W S X مار 3 E D ZEET!! Zecut 289 C $ 4 R F V 5 T (1332 1332 1332 jj1332.11332 1332 18 G G Search or type URL 6 B < 0 Y 7133 132 1322 jj1332 jj1332 jj1332 jj1332 MacBook Pro H as il zecill 2011 all zesil coul 7 N U 1332 jj1332 jjl332 jj1332 jj1332 jj1332 j J * 0* 8 3 - 2 jj1332 132 jj1332 jj1332 jj33) jj1332 jjl33 ( 9 K 32 1332 jj1332.jj1332 < O < of I ) O L command P V ; { [. option ?
7. A uniform ladder of mass (m 56.0°, find the static friction force between the ladder and the floor when a 70.0-kg person stands three-quarters of the way up the ladder? %3D 15.0 kg) and length (L) leans against a frictionless wall, see figure. If the angle 0 = N 60 ss0 L 60 sfoc ssf60 ssf60 ssf60 ssf60 ssf60 ssf60 sf60 ssf60 ssf60 ssf60 sst 60 ssf60 O ssf60 ssf60 ssf60 ssf60 ssf60 ssf60 si
A uniform 5-m long ladder weighing 60 N leans against a frictionless vertical wall. The foot of the ladder is 4 m from the wall. What is the minimum coefficient of static friction between the ladder and the floor necessary for the ladder not to slip? ? Submit Previous Answers Request Answer
A uniform horizontal beam with a length of 8 m and a weight of 200 N is attached to a wall by a pin connection. Its far end is supported by a cable that makes an angle of 53° with the beam. If a 600-N person stands 2 m from the wall. What is the tension in the cable? 53.0% 8.00 m A. 196 N B. 502 N C. 313 N D. 410 N E. None Previous page Next page II
3. A 3m long uniform ladder of mass m = 10 kg leans up against a frictionless wall as shown. The ladder resting on the floor experiences a coefficient of friction, µs = 0.4. The angle the ladder makes with the horizontal is 0. А. What is the minimum angle, 0, (non-zero!) the ladder can make with the horizontal and not slip? В. ladder at an angle 0 = 60°, what is the magnitude and direction of the frictional force on the ladder? If you now place the С. With the ladder at that same 60° angle, how high off the ground could a 70kg man get without the ladder slipping? D. Suppose the man wants to climb to the top of the ladder while it remains at that 60° angle. So he decides to attach a rope (massless of course!) to the middle of the ladder and extending horizontally to the wall where he attaches it. What will be the tension in the rope when he reaches the top of the ladder?
Item 22 A uniform ladder of mass m and length l, leans at an angle against a wall, see the figure. (Figure 1) The coefficients of static friction between ladder-ground and ladder-wall are μc and μw, respectively. The ladder will be on the verge of slipping when both the static friction forces due to the ground and due to the wall take on their maximum values. Figure HG l mg "w 1 of 1 Part B emin = Submit "Leaning ladder problems" are often analyzed under the seemingly unrealistic assumption that the wall is frictionless. You wish to investigate the magnitude of error introduced by modeling the wall as frictionless, if in reality it is frictional. Using the relation found in part A, calculate the true value of min for a frictional wall, taking uc = μw = 0.50. Express your answer to two significant figures and include the appropriate units. Part C Omin = Submit μA Part D Value Request Answer Determine the approximate value of min for the "frictionless wall" model by taking μ = 0.50 and…
A uniform horizontal beam with a length of 8 m and a weight of 200 N is attached to a wall by a pin connection. Its far end is supported by a cable that makes an angle of 53° with the beam. If a 600-N person stands 2 m from the wall. What is the tension in the cable? 53.0% 8.00 m OA. 410 N OB. None OC. 313 N D. 196 N E. 502 N