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23 Nov 2019
A small object of mass m moves in a horizontal circle ofradius r on a rough table. It is attached to a horizontal stringfixed at the center of the circle. The speed of the object isinitially v0. After completing one full trip around the circle, thespeed of the object is 0.5v0. (a) Find the energy dissipated by friction during that onerevolution in terms of m, v0, and r.(Use any variable or symbol stated above along with the followingas necessary: g.)
?Etherm =_____
(b) What is the coefficient of kinetic friction? (Use any variableor symbol stated above along with the following as necessary:g.)
µk = _____
(c) How many more revolutions will the object make before coming torest?
3________ revolutions
A small object of mass m moves in a horizontal circle ofradius r on a rough table. It is attached to a horizontal stringfixed at the center of the circle. The speed of the object isinitially v0. After completing one full trip around the circle, thespeed of the object is 0.5v0.
(a) Find the energy dissipated by friction during that onerevolution in terms of m, v0, and r.(Use any variable or symbol stated above along with the followingas necessary: g.)
(b) What is the coefficient of kinetic friction? (Use any variableor symbol stated above along with the following as necessary:g.)
µk = _____
(c) How many more revolutions will the object make before coming torest?
3________ revolutions
?Etherm =_____
(b) What is the coefficient of kinetic friction? (Use any variableor symbol stated above along with the following as necessary:g.)
µk = _____
(c) How many more revolutions will the object make before coming torest?
3________ revolutions
