The centripetal force acting on an object is doubled. The radius is also doubled. The speed of the object:
(a) increases by a factor of 4
(b) increases by a factor of 2
(c) decreases by a factor of 2
(d) The change in the object's speed depends on its mass
F = mv2/r
The Attempt at a Solution
So if I substitute 2's in for F and r in the above equation, my 2's cancel but the correct answer is a. ???