5.0 m cable 4.0 m
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A 9.00-m-long uniform
beam is hinged to a vertical wall
and held horizontally by a 5.00-mlong
cable attached to the wall 4.00
m above the hinge (Fig. ).
The metal of this cable has a test
strength of 1.00 kN, which means
that it will break if the tension in
it exceeds that amount. (a) Draw
a free-body diagram of the beam.
(b) What is the heaviest beam that
the cable can support in this configuration?
(c) Find the horizontal
and vertical components of the
force the hinge exerts on the beam. Is the vertical component upward
or downward?
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- Static of Rigid bodies Show FBD21.A uniform ladder weighing 100N leans against a smooth vertical wall with its lower endresting on a rough floor, the ladder making an angle of 70o with the horizontal. Find (a)the force exerted by the wall on the ladder and (b) the force exerted by the floor atthe lower end of the ladder.In the figure 20.0 kg boom of length 4.00 m is supported by a cable that has a breakingtension of 1000 N. The cable is perpendicular to the boom and is attached 3.00 m from thepivot. Find: (a) the maximum load that can be suspended from the end of the boom; (b) thehorizontal and vertical forces exerted by the pivot in this case.
- A taho vendor carries a 1.5 m long light plank over his shoulder. At the end of the plank are two buckets wighing 40 N and 60 N respectively. Find the value of force exerted byy his shoulder. Neglect the weight of the plank. and where should he support the plank for it to be balanced horizontally?A uniform 400 N beam of length L = 4 m is supporting a 2000 N box as shown. Find the tension in the tie rope and the force F exerted by the hinge at point P. T=? L4A 45" F=? P.A steel wire of diameter 1 mm can support a tension of 0.2 kN. Determine thediameter of a steel cable to support a tension of 20 kN?
- A 72.0 kg weightlifter doing armraises holds a 7.50 kg weight.Her arm pivots around theelbow joint, starting 40.0° belowthe horizontal (Fig.).Biometric measurements haveshown that, together, the forearmsand the hands account for 6.00%of a person’s weight. Since theupper arm is held vertically, thebiceps muscle always acts verticallyand is attached to the bonesof the forearm 5.50 cm from theelbow joint. The center of mass of this person’s forearm–hand combinationis 16.0 cm from the elbow joint, along the bones of the forearm,and she holds the weight 38.0 cm from her elbow joint. (a) Draw a freebodydiagram of the forearm. (b) What force does the biceps muscleexert on the forearm? (c) Find the magnitude and direction of the forcethat the elbow joint exerts on the forearm. (d) As the weightlifter raisesher arm toward a horizontal position, will the force in the biceps muscleincrease, decrease, or stay the same? Why?AnilA 500.-N uniform rectangular sign 4.00 mwide and 3.00 m high is suspended from ahorizontal, 6.00-m-long, uniform, 100.-N rodas indicated in Figure P8.25. The left end ofthe rod is supported by a hinge, and the rightend is supported by a thin cable making a30.0° angle with the vertical. (a) Find the tensionT in the cable. (b) Find the horizontaland vertical components of force exerted onthe left end of the rod by the hinge.
- A uniform ladder of mass (m= 13.5 kg) and length (L) leans against a frictionless wall. If the angle ©60.0°, find the static friction force between the ladder and the floor when a 60.0-kg person stands two-third of the wayup the ladder?A uniform ladder 15 ft long is leaning. against a frictionless wall at an angle of 53 \deg above the horizontal. The weight of the ladder is 30 pounds. A 70 lb boy climbs 5.0 - ft up the - ladder. What is the magnitude of the friction force exerted on the ladder by the floor?'A model for the elbow joint models the bicep muscle connecting to the horizontal forearm by a vertical tendon 4cm from the elbow joint. A mass m is held in the hand 30cm from the elbow joint. If the maximum tension that can be exerted by the tendon before injury occurs is 2250N, find the maximum mass that can be held in this way.' Im stuck on this question