Tangential acceleration problem

[kagekiri]

Homework Statement

(a) What is the tangential acceleration of a bug on the rim of a 12.0 in. diameter disk if the disk moves from rest to an angular speed of 75 revolutions per minute in 3.0 s?

(b)When the disk is at its final speed, what is the tangential velocity of the bug?

(c) One second after the bug starts from rest, what is its tangential acceleration?


What is its centripetal acceleration?

What is its total acceleration?

° (relative to the tangential acceleration)

Homework Equations

I know for a fact that all of them have to be in m/s squared.

The Attempt at a Solution

(a) 0.78 m/s squared

(b) 2.4 m/s squared

(c) 0.78 m/s squared

 

[HallsofIvy]

That's not an attempt at a solution, that is a list of answers. Please show us how you got those answers.

 

[kamerling]

You probably used a radius of 12.0 inches and not a diameter of 12.0 inches.

The answer to b) should be m/s and not m/s squared

 

[Shooting Star]

You probably used a radius of 12.0 inches and not a diameter of 12.0 inches.

The answer to b) should be m/s and not m/s squared

The unit of accn is m/s^2. All the answers should be in that unit, or equivalent.

Edit: I am extremely sorry. Just an oversight. The answer to (b) should be the unit of speed, as said by kamerling.