HW13 Problem 5.47 Part A Problem 5.47 What is his acceleration? Express your ans

Question

HW13 Problem 5.47 Part A Problem 5.47 What is his acceleration? Express your answer using two significant figures. A 70 kg climber finds himself dangling over the edge of an ice cliff, as shown in the figure below Fortunately, he's roped to a 880 kg rock located 51 m from the edge of the cliff. Assume that the coefficient of kinetic friction between rock and ice is 5.4x10-2 What is his acceleration, and how much time does he have before the rock goes over the edge? Neglect the m/ a= Submit My Answers Give Up | Figure 1 , of 1 Incorrect, One attempt remaining; Try Again "The rope connects climber and rock so they have the same acceleration. Part B How much time does he have before the rock goes over the edge? Express your answer using two significant figures. Submit My Answers Give Up re to search

Explanation / Answer

Equation for climber

70g - T = 70a .......... (i)

Equation for rock

N = 880g

T - uN = 880a

T - 0.054×880g = 880a ..... (ii)

From (i) & (ii)

70g - 0.054×880g = 950a

(70-0.054×880)g = 950a

22.48×9.81/950 = a

0.232 m/s² = a

s = ut + ½at²

51 = 0.5×0.232×t²

t² = 439.6

t = 20.96 s

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.