A Ball Is Whirled on the End of a String

question 51

Multiple Choice

A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. Complete the following statement: The centripetal acceleration of the ball can be increased by a factor of 4 by

• A)keeping the speed fixed and increasing the radius by a factor of 4.
• B)keeping the radius fixed and increasing the speed by a factor of 4.
• C)keeping the radius fixed and increasing the period by a factor of 4.
• D)keeping the radius fixed and decreasing the period by a factor of 4.
• E)keeping the speed fixed and decreasing the radius by a factor of 4.