Problem 9.9 A 66 k g adult sits at one end of a 9.1 m long board. His 29 k g chi

Question

Problem 9.9 A 66kg adult sits at one end of a 9.1m long board. His 29kg child sits on the other end. Part A Where should the pivot be placed so that the board is balanced, ignoring the board's mass? Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up Part B Find the pivot point if the board is uniform and has a mass of 16kg . Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up Problem 9.9 A 66kg adult sits at one end of a 9.1m long board. His 29kg child sits on the other end. Part A Where should the pivot be placed so that the board is balanced, ignoring the board's mass? Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up Part B Find the pivot point if the board is uniform and has a mass of 16kg . Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up Problem 9.9 Problem 9.9 A 66kg adult sits at one end of a 9.1m long board. His 29kg child sits on the other end. A 66kg adult sits at one end of a 9.1m long board. His 29kg child sits on the other end. A 66kg adult sits at one end of a 9.1m long board. His 29kg child sits on the other end. Part A Where should the pivot be placed so that the board is balanced, ignoring the board's mass? Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up Part B Find the pivot point if the board is uniform and has a mass of 16kg . Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up Part A Where should the pivot be placed so that the board is balanced, ignoring the board's mass? Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up Part A Where should the pivot be placed so that the board is balanced, ignoring the board's mass? Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up d =   m from adult d =   m from adult SubmitMy AnswersGive Up Part B Find the pivot point if the board is uniform and has a mass of 16kg . Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up Part B Find the pivot point if the board is uniform and has a mass of 16kg . Express your answer using two significant figures. d =   m from adult SubmitMy AnswersGive Up d =   m from adult d =   m from adult SubmitMy AnswersGive Up

Explanation / Answer

in the first case let the pivot be at a distance x from 66kg man.then total force at pivot =95kg(upward)

taking moment along the 29 kg child we get

95*(9.1-x)=66*9.1

we get x=2.778 m from 66 kg man end

in the second case total force at pivot=66+29+16=111

taking moment about 29 kg child we get 111(9.1+x)=66*9.1+16*9.1*9.1/2

x=2.27m from adult side to the right side

in the secondc case the pivot is outside the board 2.27m from the adult

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

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