Q: A uniform, 7.5-m-long beam weighing
A uniform, 7.5-m-long beam weighing 6490 N is hinged to a wall and supported by a thin cable attached 1.5 m from the free end of the beam. The cable runs between the beam and the wall and makes a 40°...
See AnswerQ: A uniform drawbridge must be held at a 37° angle above
A uniform drawbridge must be held at a 37° angle above the horizontal to allow ships to pass underneath. The drawbridge weighs 45,000 N and is 14.0 m long. A cable is connected 3.5 m from the hinge wh...
See AnswerQ: As part of an exercise program, a 75-kg person
As part of an exercise program, a 75-kg person does toe raises in which he raises his entire body weight on the ball of one foot (Fig. P11.59). The Achilles tendon pulls straight upward on the heel bo...
See AnswerQ: A helicopter has a large main rotor that rotates in a horizontal
A helicopter has a large main rotor that rotates in a horizontal plane and provides lift. There is also a small rotor on the tail that rotates in a vertical plane. What is the purpose of the tail roto...
See AnswerQ: (a) In Fig. P11.60 a 6.
(a) In Fig. P11.60 a 6.00-m-long, uniform beam is hanging from a point 1.00 m to the right of its center. The beam weighs 140 N and makes an angle of 30.0° with the vertical. At the right-h...
See AnswerQ: A uniform, horizontal flagpole 5.00 m long with a
A uniform, horizontal flagpole 5.00 m long with a weight of 200 N is hinged to a vertical wall at one end. A 600-N stuntwoman hangs from its other end. The flagpole is supported by a guy wire running...
See AnswerQ: A holiday decoration consists of two shiny glass spheres with masses 0
A holiday decoration consists of two shiny glass spheres with masses 0.0240 kg and 0.0360 kg suspended from a uniform rod with mass 0.120 kg and length 1.00 m (Fig. P11.62). The rod is suspended from...
See AnswerQ: The yoga exercise “Downward-Facing Dog” requires stretching your
The yoga exercise “Downward-Facing Dog†requires stretching your hands straight out above your head and bending down to lean against the floor. This exercise is per...
See AnswerQ: A uniform metal bar that is 8.00 m long and
A uniform metal bar that is 8.00 m long and has mass 30.0 kg is attached at one end to the side of a building by a frictionless hinge. The bar is held at an angle of 64.0o above the horizontal by a th...
See AnswerQ: A worker wants to turn over a uniform, 1250-N
A worker wants to turn over a uniform, 1250-N, rectangular crate by pulling at 53.0° on one of its vertical sides (Fig. P11.65). The floor is rough enough to prevent the crate from slipping...
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