O Arlene is to walk across a "high wire" strung horizontally between two buildings 20.0 m apart. The sag in the rope when she is at the midpoint is 10.0°, as shown in Fig. If her mass is 50.0 kg, what is the tension in the rope at this point? 70
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- To hang a 6.20-kg pot of flowers, a gardener uses two wires—one attached horizontally to a wall, the other sloping upward at an angle of u = 40.0° and attached to the ceiling. Find the tension in each wire.PA crate of mass m (=20 kg) is placed at rest on a (frictionless) inclined plane, which has an angle 8 (= 60°) above horizontal. a.) The force of gravity on the crate is: size: N direction: ---Select--- b.) The normal force on the crate is: size: N direction: ---Select--- c.) The net force on the crate is: size: N direction: ---Select--- d.) How long would it take the crate to slide 4 m down the incline? e.) If the crate were kept from sliding by a rope pulling parallel to the incline, what would the size of the tension be? NWhile digging a small hole prior to planting a tree, a homeowner encounters rocks. If he exerts a horizontal 239-N force on the prybar as shown, what is the horizontal force exerted on rock C? Note that a small ledge on rock C supports a vertical force reaction there. Neglect friction at B. Complete solutions (a) including and (b) excluding the weight of the 17-kg prybar. A 239 N 1550 mm 16° B 230 mm Answers: (a) Including weight, Fc- i (a) Excluding weight, Fe- i N
- 10) A push of magnitude P acts on a box of weight W as shown in the figure. The push is directed at an angle 0 below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box. What is the friction force on the box due to the floor? P. W4) A block of weight w is suspended from a rope tied to two other ropes at point O. One rope is horizontally attached to a wall and the other is fastened to the ceiling. The angle between ceiling and the rope is 60°. What are the tensions in each of the ropes? Assume the weights of the ropes and the knot are negligible. If the weight of the block is 100 N, what is the tension in the ceiling rope?A 45 kg box is at rest at one end of a 2 meter board. That end of the board is slowly raised at an incline until the box starts to slide. At that point, the angle is at 34 degrees. The coefficient of kinetic friction is 0.50N. Please help me calculate the coefficient of static friction between both the box and the board?
- a bridge across a small stream is made by supporting a 10m long log with a mass of 75kg with ropes tied at the ends of the log to the tree on the banks. the rope on the right makes a 25 degree angle with the ground. the rope on the left makes a 20 degree angle with the ground. a 25kg child us standing 7.5 m from the left bank. what is the total tension in the right rope? what is the total tension in the left rope?A block resting on a plane inclined at an angle, 6, of 39° from the horizontal is being held in place by a steel cable. The tension on the cable wire is 50 N. Determine the gravitational force, Fg.You can hold your 2.5 kg textbook against the wall, preventing it from slipping down, if you press your hand against it horizontally. Suppose the coefficient of static friction between the book and the wall is 0.50, and there is no friction between your hand and the book. What minimum force do you need to apply to keep the book from slipping down?
- A particle, of weight W newtons, is held in equilibrium by two forces of magnitudes 20 newtons and 30 newtons. The 20 newton force is horizontal and the 30 newton force acts at an angle 0 above the horizontal, as shown in the diagram. All three forces act in the same vertical plane 30 N 20 N W (i) Find 0, to the nearest minute. (ii) Find W, to 1 decimal place.An 85 kg man tries to pull himself up the face of a boulder using a rope hooked to a tree above it. The face of the boulder created a 50.0° angle with the horizontal. If the coefficient of friction between his shoes and the boulder is 0.350, will he make it up if he pulls with 550. N of force? Remember his shoes will try to slip backwards when considering friction.2. A 16.5-lb block B rests as shown on a 33-lb bracket A. The coefficients of friction are µs = block B and bracket A, and there is no friction in the pulley or between the bracket and the horizontal surface 0.35 and u = 0.28 between a. Determine the maximum weight of block C if block B not slide on bracket A. b. If the weight of block C is 10 percent larger than the answer found in a, determine the accelerates of A, B and C. A B 4/ 4 ...