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 84.0-kg climber, who is 1.88 m tall and has a center of gravity 1.2 m from his feet, rappels down a vertical cliff with his body raised 39.4° above the horizontal. He holds the rope 1.58 m from his feet, and it makes a 25.9° angle with the cliff face. Figure 1 of 1 Part A What tension does his rope need to support Express your answer using two significant T = Submit ΥΠΙ ΑΣΦ Request Answer

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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
84.0-kg climber, who is 1.88 m tall and has a center
of gravity 1.2 m from his feet, rappels down a vertical
cliff with his body raised 39.4° above the horizontal.
He holds the rope 1.58 m from his feet, and it makes
a 25.9° angle with the cliff face.
Figure
1 of 1
▼
Part A
What tension does his rope need to support?
Express your answer using two significant figures.
T=
Submit
Part B
—| ΑΣΦ
Request Answer
?
N
?
Review
Constants
Find the horizontal component of the force that the cliff face exerts on the climber's feet.
Express your answer using two significant figures.
IVE ΑΣΦ
Transcribed Image Text: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 84.0-kg climber, who is 1.88 m tall and has a center of gravity 1.2 m from his feet, rappels down a vertical cliff with his body raised 39.4° above the horizontal. He holds the rope 1.58 m from his feet, and it makes a 25.9° angle with the cliff face. Figure 1 of 1 ▼ Part A What tension does his rope need to support? Express your answer using two significant figures. T= Submit Part B —| ΑΣΦ Request Answer ? N ? Review Constants Find the horizontal component of the force that the cliff face exerts on the climber's feet. Express your answer using two significant figures. IVE ΑΣΦ
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 figures.
——| ΑΣΦ
Fv:
=
Submit
Part D
Request Answer
?
Constants
N
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.
Transcribed Image Text: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 figures. ——| ΑΣΦ Fv: = Submit Part D Request Answer ? Constants N 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.
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