A Ball Attached to the End of a String Is

Multiple Choice

A ball attached to the end of a string is swung around in a circular path of radius r.If the radius is doubled and the linear speed is kept constant,

A) the centripetal acceleration remains the same.
B) the centripetal acceleration increases by a factor of 2.
C) the centripetal acceleration decreases by a factor of 2.
D) the centripetal acceleration increases by a factor of 4.
E) the centripetal acceleration decreases by a factor of 4.