8. A fisher slowly lifts a fish with a 6 m long fishing-rod, the mass of which 0.5 kg. One hand of the fisher holds grip at the end of the rod with a force 200 N, the other at a distance X from the end with a force 150 N. Find distance X and mass of the fish. Sketch the force diagram. Assume that the rod is a cylinder with uniform distribution of mass over its length.
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- 2. Barry carries his tray of food to his favorite cafeteria table for lunch. The 0.50 m long trayhas a mass of 0.20 kg and holds a 0.40 kg plate of food 0.20 m from the right edge.Barry holds the tray by the left edge with one hand, using his thumb as the fulcrum, andpushes up 0.10 m from the fulcrum with his finger tips.a. How much upward force must his finger tips exert to keep the tray level? b. How might Barry make the tray easier to carry if he chooses to use only one hand?Answer the following questions. 1. A box of weight 100 N hangs from the rope. The rope weighs 50 N and is uniform. What is the tension in the rope? a. 100 N throughout the rope b. 150 N throughout the rope It varies from 100 N at the bottom of the rope to 150 N at the с. top. A block of weight 25 kg is resting on an inclined surface with dimensions of 4 meter wide and 3 m high (See figure at the fight). Find the following: 2. Which of the following about the figure NOT true? Given wotating the axes 37 degrees clockwise. a. Fx=Ff-245sin37 b. Fx=Ff-25sin37 5m c. Fx=Ff-245cos 37 d. Fx=Ff-245sin37 3 m 3. Which of the following about the figure NOT true? Given 37 otating the axes 37 degrees clockwise. a. Fy=N-245cos37 b. Fy=N-245sin37 c. Fy=N-25cos37 d. Fy=N-25sin37 4. Find the Normal force Nacting on the object. a. 19.96 N b. - 19.86 N c. 195.66 N d. 147.44 N 4 m 5. Find the friction force Ff a. 19.96 N b. - 19.86 N c. 195.66 N d. 147.44 N 6. Find the coefficient of static friction µ. a.…*60. ao A rigid massless rod is rotated about one end in a horizontal cir- cle. There is a particle of mass m, attached to the center of the rod and a particle of mass m, attached to the outer end of the rod. The inner section of the rod sustains a tension that is three times as great as the tension that the outer section sustains. Find the ratio m,/m2.
- The bear of weight 700 N walking on the horizontal beam pivoted at point A and supported by a rope at an angle 60∘ on point B. The bear wants to reach a basket full of honey. The basket weighs 80 N. The honey basket weighs 200 N, and the beam length 6 m. When the bear in at ? = 1 m, a. Find the tension of the rope supporting the beam. b. What is the component of the forces exerted on the wall (point A)?A 250 kg cylinder rests in a long channel as shown. Find the forces acting on the cylinder by the sides of the channel. The FBD is easy enough, but I'm having trouble finding the forces. The textbook has the answers as 1999 N and 893 N, but I'm unsure how to get to those answers86.5 The figure shows an arrangemen in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude B10 Non the wvall to which it is attached. The tensions in the shorter cords are T; = 55.6 N, T, = 365N, and T3= 9.6', N. What are the masses of (a) disk A. (b) disk B. (c) disk C. and (d) disk D? SS.6 36.5 9.6 T. Units {a) Number Units (b) Number Units (c) Number Units (d) Number
- Shown are two thin beams joined at right angles. The vertical beam is 15.0 kg and 1.00 m long and the horizontal beam is 25.0 kg and 2.00 m long.a. Find the center of gravity of the two joined beams. Express your answer in the form (x, y), taking the origin at the corner where the beams join.b. Calculate the gravitational torque on the joined beams about an axis through the corner. The beams are seen from the side.An 88 kg person stands on a uniform ladder 4.0 m long, that weighs 100 N, as shown in the figure(Figure 1). The floor is rough; hence, it exerts both a normal force, f1, and a frictional force, f2, on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force, f3. Figure f₁ mg f3 a-3.8 m 1 of 1 Part A Using the dimensions given in the figure, find the forces exerted on the ladder when the person is halfway up the ladder. Express your answers using two significant figures separated by commas. fi, f2, f3 962.4,157.17,157.17 Submit ΓΨΠ ΑΣΦ Part B Previous Answers Request Answer X Incorrect; Try Again; 9 attempts remaining f1, f2, f3 = w Find the forces exerted on the ladder when the person is three-fourths of the way up the ladder. Express your answers using two significant figures separated by commas. VE ΑΣΦ kN ≈ ? kNTwo children push on opposite sides of a door during play. Both push horizontally and perpendicular to the surface of the door. One child pushes with a force of 18.5 N at a distance of 0.625 m from the hinges, and the second child pushes at a distance of 0.47 m. a) What is the magnitude of the force, in newtons, the second child must exert to keep the door from moving? Assume friction is negligible. F2 =
- A tightrope walker is walking between two buildings holding a pole with length L = 14.0 m, and mass m, = 18.5 kg. The daredevil grips the pole with each hand a distance d = 0.575 m from the center of the pole. A bird of mass m, = 545 g lands on the very end of the left-hand side of the pole. 2d Assuming the daredevil applies upward forces with the left and right hands in a direction perpendicular to the pole, what magnitude of force Fieft and Fright must the left and right hand exert to counteract the torque of the bird? Fieft = N Fright NProblems 1. A 0.3kg meterstick is suspended motionless by a shark's tooth which is 0.2 meters to the right of the ruler's center of mass, and a toy giraffe which is holding up the left end, 0.5 meters to the left of the center of mass. Fill in the table, and find the force of the giraffe on the meterstick. Meterstick y lacuna torque N? 0.5m 0.2m H Y Xс. Consider a balanced seesaw. The balanced seesaw consists of a girl weighing 250 N on the left side of the seesaw and a boy weighing 500 N on the right side as shown in the Figure below. The girl on the left was given a bag of apples weighing 50 N by her mother. Where should the girl sit in order to be in balance, assuming the heavier boy does not move? Aside from calculations, express your answer through drawings showing a free-body diagram of forces present in the girl and boy before and after the girl was handed a bag of apples by her mother. a ) - 3 m * 1.5 m > Girl Boy