007 (part 1 of 2) 10.0 points A 0.4 kg bead slides on a curved wire, starting fr

Question

007 (part 1 of 2) 10.0 points A 0.4 kg bead slides on a curved wire, starting from rest at point A as shown in the figure. The segment from A to B is frictionless, and the segment from B to C is rough. The point A is at height 5.2 m and the point C is at height 1.8 m with respect to point B. 5.2 m 1.8 m Find the speed of the bead at B. The accel- eration due to gravity is 9.8 m/s2 . Answer in units of m/s 008 (part 2 of 2) 10.0 points If the bead comes to rest at C, find the change in mechanical energy due to friction as it moves from B to C. Answer in units of J. 009 (part 1 of 3) 10.0 points

Explanation / Answer

007) speed of bead at B

vbead = sqrt [2 g y] = sqrt [2 * 9.8 * 5.2]

= 10.1 m/s

008) change in mechanical energy

delta E = m vbead2 / 2 - m g yc

= [0.4 * 10.12 / 2 ] - [0.4 * 9.8 * 1.8]

= 13.3 J

Related Questions

Navigate

• Browse (All)
• Browse
• Subjects

---

---

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