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Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal and their feet pushing against the cliff (Figure 1). Suppose that an 80.3-kg climber, who is 1.72 m tall and has a center of gravity 1.1 m from his feet, rappels down a vertical cliff with his body raised 25.4° above the horizontal. He holds the rope 1.44 m from his feet, and it makes a 28.4° angle with the cliff face.

Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal and their feet pushing against the cliff (Figure 1). Suppose that an 80.3-kg climber, who is 1.72 m tall and has a center of gravity 1.1 m from his feet, rappels down a vertical cliff with his body raised 25.4° above the horizontal. He holds the rope 1.44 m from his feet, and it makes a 28.4° angle with the cliff face.

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I Review Constants Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal and their feet pushing against the cliff (Figure 1). Suppose that an 80.3-kg climber, who is 1.72 m tall and has a center of gravity 1.1 m from his feet, rappels down a vertical cliff with his body raised 25.4° above the horizontal. Part A What tension does his rope need to support? Express your answer using two significant figures. He holds the rope 1.44 m from his feet, and it makes a 28.4° angle with the cliff face. ? T = N igure 1 of 1 Submit Request Answer Part B Find the horizontal component of the force that the cliff face exerts on the climber's feet. Express your answer using two significant fıgures. ΑΣφ FH = N
Transcribed Image Text:I Review Constants Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal and their feet pushing against the cliff (Figure 1). Suppose that an 80.3-kg climber, who is 1.72 m tall and has a center of gravity 1.1 m from his feet, rappels down a vertical cliff with his body raised 25.4° above the horizontal. Part A What tension does his rope need to support? Express your answer using two significant figures. He holds the rope 1.44 m from his feet, and it makes a 28.4° angle with the cliff face. ? T = N igure 1 of 1 Submit Request Answer Part B Find the horizontal component of the force that the cliff face exerts on the climber's feet. Express your answer using two significant fıgures. ΑΣφ FH = N
II Review | Constants Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal and their feet pushing against the cliff (Figure 1). Suppose that an 80.3-kg climber, who is 1.72 m tall and has a center of gravity 1.1 m from his feet, rappels down a vertical cliff with his body raised 25.4° above the horizontal. Part C Find the vertical component of the force that the cliff face exerts on the climber's feet. Express your answer using two significant fıgures. He holds the rope 1.44 m from his feet, and it makes a 28.4° angle with the cliff face. Figure Fy : N 1 of 1 Submit Request Answer Part D What minimum coefficient of static friction is needed to prevent the climber's feet from slipping on the cliff face if he has one foot at a time against the cliff? Express your answer using two significant figures. Π ΑΣφ ? µs =
Transcribed Image Text:II Review | Constants Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal and their feet pushing against the cliff (Figure 1). Suppose that an 80.3-kg climber, who is 1.72 m tall and has a center of gravity 1.1 m from his feet, rappels down a vertical cliff with his body raised 25.4° above the horizontal. Part C Find the vertical component of the force that the cliff face exerts on the climber's feet. Express your answer using two significant fıgures. He holds the rope 1.44 m from his feet, and it makes a 28.4° angle with the cliff face. Figure Fy : N 1 of 1 Submit Request Answer Part D What minimum coefficient of static friction is needed to prevent the climber's feet from slipping on the cliff face if he has one foot at a time against the cliff? Express your answer using two significant figures. Π ΑΣφ ? µs =
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