What is the centripetal acceleration of a ball on a string that is whirled horizontally over a boy’s head? the radius of the circle is 1.8 meters, and the ball is traveling at 9.2 meters/second. 19 meters/second2 84 meters/second2 110 meters/second2 31 meters/second2 47 meters/second2

Centripetal acceleration is 47 m/s²

Explanation:

It is given that,

Radius of the circle, r = 1.8 meters

The velocity of the ball, v = 9.2 m/s

We have to find the centripetal force of a ball on a string that is whirled horizontally over a boy’s head. It is given by :

or

So, the centripetal acceleration of the ball on a string is 47 m/s². Hence, the correct option is (E).                        

i think the answer would be reserve.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2