Ga ball is whirled on the end of a string in a horizontal circle of radius r at constant speed v. which way(s) can increase the centripetal acceleration of the ball by a factor of 9? group of answer choices keeping the speed fixed and decreasing the radius by a factor of 9 keeping the radius fixed and increasing the speed by a factor of 3 decreasing both the radius and the speed by a factor of 9 keeping the radius fixed and increasing the speed by a factor of 9 increasing both the radius and the speed by a factor of 9 keeping the speed fixed and increasing the radius by a factor of 9

Explanation:

The centripetal acceleration of the ball that is whirled on the end of a string in a horizontal circle of radius R at constant speed v, is given by :

Option (1) : Keeping the speed fixed and decreasing the radius by a factor of 9

The centripetal acceleration of the ball by a factor of 9.

Option (2) : Keeping the radius fixed and increasing the speed by a factor of 3

Acceleration increases.

Option (3) : Decreasing both the radius and the speed by a factor of 9.

Acceleration decreases by a factor of 9.

Option (4) : Keeping the radius fixed and increasing the speed by a factor of 9

Acceleration increases.

Option (5) : Increasing both the radius and the speed by a factor of 9

Acceleration increases.

Option (6) : Keeping the speed fixed and increasing the radius by a factor of 9

Acceleration increases.

Hence, this is the required solution.