Question

A ball traveling in a circle with a constant speed of 8 m/s has a centripetal acceleration of 20 m/s2. What is the radius of the circle?

The radius of the circle is ____
m.

Answer 1

Step-by-step explanation:

First we will get the time from the given

time =velocity÷acceleration, 8÷20= 0.4s

then we are going to get the distance (circumference)

d=velocity ×time, 8×0.4=3.2

since that the circumference =2/pi (r)²

2×22÷7×r²=3.2 , 3.2 ÷44÷7=0.509 root 0.509

radius=0.71

Answer 2

The radius of the circle will be 20