s Secure | https://session.masteringphysics.com/myct/itemView?assignmentProblemI

Question

s Secure | https://session.masteringphysics.com/myct/itemView?assignmentProblemID-943576958offset-next C 1315H.Work2 Problem 10.5 How much work does the string do on the boy if the boy stands still? Express your answer using two significant figures Constants A boy flies a kite with the string at a 30° angle to the horizontal. The tension in the string is 4.5 N. Submit Request Answer Part B How much work does the string do on the boy if the boy walks a horizontal distance of 11 kite? Express your answer using two significant figures. ? AZO Submit Request Answer

Explanation / Answer

PART A

The equation for work is W = force x distance. Since the boy isn't moving, the distance is zero. Anything times zero is zero.

W = 0 Joule

part B

If he did walk backwards with no velocity indicated, and held the string and it stayed at 30 deg .

Work done = 4.5 cos(180-30) x 11 = - 42.868 Joules

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

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