Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 4, Problem 23SP
The system in Fig. 4-11 remains at rest when
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Ans.
11-2.6. In Fig. P-11-2.5, assume P= 200 lb and the coefficient of
kinetic friction is 0.5. Find the acceleration of the body under the following
conditions: (a) the body is moving rightward; (b) the body is moving left-
ward; (c) the body starts from rest.
11.-27. When a 644-1b boat is moving at 10 fps the motor conks out
A box of 450N is lying in an inclined plane with angle of 35 degrees. If the applied load to move the box is 269N. Determine the net Ff and the acceleration of the box if the coefficient of static friction is 0.35 and the coefficient of kinetic friction is 0.28.
A 10kg block resting on the flat frictionless plane is pushed by a force directed force of 20N 60deg S to E . What is the magnitude of normal force acting on the block?
Chapter 4 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 4 - 4.9 [I] A person stands on a scale, which then...Ch. 4 - 4.10 [I] Two evenly matched teams of youngsters...Ch. 4 - 4.11 [I] A rope is tied to a hook fastened to a...Ch. 4 - 4.12 [I] An essentially weightless pulley that is...Ch. 4 - 4.13 [I] An essentially weightless rope is slung...Ch. 4 - 4.14 [I] An essentially weightless rope is slung...Ch. 4 - 4.15 [I] A 2.00-kg block rests on a frictionless...Ch. 4 - 4.16 [I] The load in Fig. 4-7 is hanging at rest....Ch. 4 - 4.17 [I] (a) A 600-N load hangs motionlessly in...Ch. 4 - 4.18 [I] For the situation shown in Fig. 4-9, find...
Ch. 4 - 19. The following coplanar forces pull on a ring:...Ch. 4 - 4.20 [II] In Fig. 4-10, the pulleys are...Ch. 4 - 4.21 [II] Suppose in Fig. 4-10 is 500 N. Find the...Ch. 4 - 4.22 [I] If in Fig. 4-11 the friction between the...Ch. 4 - 4.23 [II] The system in Fig. 4-11 remains at rest...Ch. 4 - 24. Find the normal force acting on the block in...Ch. 4 - 25. The block depicted Fig. 4-12(a) slides with...Ch. 4 - 26. The block shown in Fig. 4-12(b) slides at a...Ch. 4 - 27. The block in Fig. 4-12(c) just begins to slide...Ch. 4 - 4.28 [II] If in the equilibrium situation shown...Ch. 4 -
29. Refer to the equilibrium situation shown in...Ch. 4 - 4.30 [III] The hanging object in Fig. 4-14 is in...Ch. 4 - 31. The pulleys shown in Fig. 4-15 have negligible...Ch. 4 - 4.32 [III] In Fig. 4-16, the system is at rest....Ch. 4 - 4.33 [III] The block in Fig. 4-16 is just on the...
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- A 350-lb block rests on a rough plane inclined 60 with the horizontal. If thecoefficients of friction between the block and the plane are 0.78 for static and 0.42 for kinetic respectively, determine whether or not the block is at rest.arrow_forwardAn incline makes an angle of 30.0 degrees with the horizontal. (Static friction coefficent of the inclined surface = 0.4 and the kinetic friction coefficent is 0.1) A block must pass through the top of the incline with a velocity of 3.0 m/s. At what distance along the incline must you realeas the block?arrow_forwardA 5.00 kg block is thrown up an inclined plane with an initial speed of 8.00 m / s which stops after traveling 3.00 m along the plane, which is inclined at an angle of 30 , 0 ° from the horizontal. For this motion determine the coefficient of kinetic friction between the block and the surface.arrow_forward
- 15-9. The 200-kg crate rests on the ground for which the coefficients of static and kinetic friction are µ, = 0.5 and Hk =0.4, respectively. The winch delivers a horizontal towing force T to its cable at A which varies as shown in the graph. Determine the speed of the crate when 1= 4 s. Originally the tension in the cable is zero. Hint: First determine the force needed to begin moving the crate. T (N) 800 T = 400 2 -t (s) 4arrow_forwardYou want to use a rope to pull a 12 kg box of books up a plane inclined 30 degrees above the horizontal. The coefficient of kinetic friction is 0.28.The rope pulls parallel to the incline. What force do you need to exert on the rope if you want to pull the box with a constant acceleration of 0.50 m/s squared yp the plane?arrow_forwardA 0.170 kg hockey puck is initially moving at 21.2 m/s [W] along the ice. The coeffi cientof kinetic friction for the puck and the ice is 0.005(a) What is the speed of the puck after travelling 58.5 m?(b) After being played on for a while, the ice becomes rougher and the coeffi cient ofkinetic friction increases to 0.047. How far will the puck travel if its initial and fi nalspeeds are the same as before?arrow_forward
- As shown in the figure below, a box of mass m = 59.0 kg (initially at rest) is pushed a distance d = 70.0 macross a rough warehouse floor by an applied force of FA = 228 N directed at an angle of 30.0° below the horizontal. The coefficient of kinetic friction between the floor and the box is 0.100. Determine the following. (For parts (a) through (d), give your answer to the nearest multiple of 10.) (a) work done by the applied force (c) work done by the normal force (e) Calculate the net work on the box by finding the sum of all the works done by each individual force. (f) Now find the net work by first finding the net force on the box, then finding the work done by this net force.arrow_forwardProbs. 2-96/97 2-123. Determine the magnitude of the projected component of the force F (400i-200j+500k} N acting along the cable BA. 2m 3m Probs. 2-122/123/124arrow_forwardProblem 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° 150arrow_forward
- An inextensible cable of negligible mass is used to drag a log on a roughhorizontal surface. The tension in the cable is 850 N and it acts at an angle of 35°to the horizontal. The log is dragged over a distance of 45m. The frictional forceexperienced by the log is 150 N. Calculate the net force acting on the log.arrow_forwardA block of mass 3.40 kg is pushed up against a wall by a force P that makes an angle of-50.0 angle with the horizontal as shown below. The coemicient of static triction between the block and the wal is 0.241. (a) Determine the possible values for the magnitude of P that allow the block to remain stationary. (If there is no maximum, enter NONE in that answer blank.) Pml- (b) What happens if IPI has a larger value than P O The block sides up the wall, O The block does not side along the wal. O The block sides down the wall. What happens if PI has a smaller value than Pl? O The block slides up the wall. O The block does not slide along the wall. O The block slides down the wall. (c) Repeat parts (a) and (b) assuming the force makes an angle of 15.0 with the horizontal. Determine the possible values for the magnitude of P that allow the block to remain stationary. (f there is no maximum, enter NONE in that answer blank.) ma What happens if PI has a larger value than Pmal? O The block…arrow_forwardA mass M = 12.0 kg is pulled up an incline plane by a F = 170 N. The plane angle is 30o with respect to the horizontal. The kinetic coefficient of friction between the surfaces is μ = 0.40. Calculate the acceleration of the blockarrow_forward
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