The centripetal acceleration is defined as the square of the tangential velocity between the radius.
In this case we know that the radius r is
The speed v is:
Then we use these values to find the centripetal acceleration.
Is going to be (84)
The correct answer is
The centripetal acceleration of the edge of the disc is given by:
v=3.3 m/s is the tangential speed at the edge of the disc
r=0.13 m is the radius of the disc
Therefore, substituting the numbers into the equation, we find the centripetal acceleration: