What Is the Rotational Acceleration in a Revolving Door?

[tymartin]

Homework Statement

Suppose a revolving door at the bank is spinning around once every 4 seconds. As you walk through, you push on the door for 3 seconds, which increases the rotational speed so that it rotates once a second. What wat the rotational acceleration due to your push?

Homework Equations

This is what I have so far...

The Attempt at a Solution

Acceleration-90/4=22.5

Displacement-360/3=120

22.5 + 120= 140.5 rev/s

 

[LowlyPion]

Maybe draw on your linear kinematic experience and consider the rotational analogs?
http://hyperphysics.phy-astr.gsu.edu/hbase/mi.html#rlin

With θ in radians and ω in rad/sec, makes things a little easier.