1. rotating door is made from four rectangular glass panes, as shown in the drawing. The mass of each pane is 95 kg. A person pushes on the outer edge of one pane with a force of F = 80 N that is directed perpendicular to the pane. Determine the magnitude of the door's angular acceleration.

The with of each pane to the rotation axis is 1.2m

This is how I approached it

F=ma
a= f/m =80/95 = 0.84

Now Tangential Acceleration a = angular acceleration x radius

## The Attempt at a Solution

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SGT
Since the movement is rotational, you should use torque and momentum of inertia, instead of force and mass.

Since the movement is rotational, you should use torque and momentum of inertia, instead of force and mass.

How do I do that? Where do i start? please hep

cristo
Staff Emeritus
Well, what do you know about torque and moment of inertia? In particular, do you know how to relate torque to the angular acceleration?

no. I don't

cristo
Staff Emeritus