A ball of mass 0.13 kg, is whirled round in a horizontal circle, on the end of a
string of length 0.60m, and completes 5 revolutions per second.
(a) the angular velocity of the ball;
(b) the speed of the ball;
(c) the tension of the string.
(a) Angular velocity = (2) x (Pi) x (Frequency of revolutions)
(b) Speed of ball = (radius) x (angular velocity)
(c) tension in string = (mass) x (initial speed*2)
........................................divided by 2
* = To the power of
The Attempt at a Solution
(a) Angular velocity = 31.4 rad/s
(b) Speed of ball = 18.84 m/s
(c) Tension in string = ???
im confused about part (c) the question does not give an initial speed, so do i use the velocity i have got from part (b) is it not the same thing or would it be wrong to do that?
any help is appreciated......