 #1
AlLayth
 18
 1
 Homework Statement:

A ball of 5.0 kg mass is attached to the end of a long wire and whirled around in a perfect
circle of 0.9 m radius in the vertical plane. Calculate the following:
Calculate the Minimum Velocity and Minimum Angular Velocity
 Relevant Equations:

#F= m\frac{v^2}{r} = mw^{2}r#
#m: Mass#
#v: Speed#
#r: Circle Radius#
#w: Angular Velocity#
#F= m\frac{v^2}{r} = mw^{2}r#
#m=5#
#r=0.9#
#F= 5\frac{v^2}{0.9} = (0.9)5w^{2}#
#5\frac{v^2}{0.9} = (0.9)5w^{2}#
#\frac{v^2}{0.9} = (0.9)w^{2}#
#v=0.9w#
then I get stuck cause I have both unknowns in one equations (i bet it has something to do with the question’s use of “minimum” but I don’t know where to go from here) so help mee thx
#m=5#
#r=0.9#
#F= 5\frac{v^2}{0.9} = (0.9)5w^{2}#
#5\frac{v^2}{0.9} = (0.9)5w^{2}#
#\frac{v^2}{0.9} = (0.9)w^{2}#
#v=0.9w#
then I get stuck cause I have both unknowns in one equations (i bet it has something to do with the question’s use of “minimum” but I don’t know where to go from here) so help mee thx