A small mass M attached to a string slides in a circle (x) on a frictionless hor

Question

A small mass M attached to a string slides in a circle (x) on a frictionless horizontal table, with the force F providing the necessary tension (see figure) The force is then increased slowly ?nd then maintained constant when M travels around in circle (y). The radius of circle (x) is twice the radius of circle Y. B while going from x to y, there is no torque on M. As M moves from x to y, the work done by F is..0 M's kinetic energy at x is one quarter that at y B M's angular momentum at x is that at y M's angular velocity at x is half that at y. Tries 0/12 Submit Answer

Explanation / Answer

(1) True as force is applied across point of rotation so net torque is zero

(2)false

(3)equal (as angular momentum will be conserved .Iw=constant. )

(4) True ( as r is doube ,v will be half so Kinetic energy will be quarter )

(5) False (mr^2*w=constant .So if r is half ,w will be 4 times )

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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