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## Homework Statement

A thin uniform rectangular sign hangs vertically above the

door of a shop. The sign is hinged to a stationary horizontal

rod along its top edge. The mass of the sign is 2.40 kg

and its vertical dimension is 50.0 cm. The sign is swinging

without friction, becoming a tempting target for children

armed with snowballs. The maximum angular displacement

of the sign is 25.0° on both sides of the vertical. At a

moment when the sign is vertical and moving to the left, a

snowball of mass 400 g, traveling horizontally with a velocity

of 160 cm/s to the right, strikes perpendicularly the

lower edge of the sign and sticks there.

Is the system (sign-snowball) going to move left or right?

## Homework Equations

Conservation of angular momentum.

## The Attempt at a Solution

Lost