What forces do work on this system? MasteringPhysics: HW06- Google Chrome à Secu

Question

What forces do work on this system? MasteringPhysics: HW06- Google Chrome à Secure https//session masteringphysics.com/myct/itemView?assignmentProblemiD-82541948 tW06 ±PSS 9.|Rotational Energy To practice Problem-Solving Strategy 9.1 Rotational Energy Part A A frictionless pulley has the shape of a uniform solid disk of mass 6.00 kg and radius 23.0 cm. A2.60 kg stone is attached to a very light wire that is wrapped around the rim of the pulley Figure 1), and the stone is released from rest. As it falls down, the wire unwinds without stretching or slipping, causing the pulley to rotate. How far must the stone fall so that the pulley has 4.60 J of kinetic energy? What forces do work on this system? Check all that apply Hints Hint 1. How to approach this problem (cick to open) Figure 1 of 1 normal forco gravitational force G frictional force D tension pulley Submit My Answers Give Up Incorrect; One attempt remaining: Try Again There is a frictional force present between the wire and the pu occurs d thro is a displacoment in the same director, as te parallel to the frictional foroe? Part 8 9 ETT-PACKARD

Explanation / Answer

for the given system, the work done by any force must change the kinetic / potential energy of the system
so we can see
gravitational force decreases the PE of the system
Frictionaal force decreases KE of the system
tension also does work on both pulley and the mass, but as it is an internal force, net work done by the tension on the systme is 0
hence

work is done on the systme by 2 forces
1. gravitational force
2. friction

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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