A thin, uniform, rectangular sign hangs vertically above the doorof a shop. The

Question

A thin, uniform, rectangular sign hangs vertically above the doorof a shop. The sign is hinged to a stationary horizontal rod alongits top edge. The mass of the sign is 2.40 kg and its verticaldimension is 75.0 cm. The sign isswinging without friction, becoming a tempting target for childrenarmed with snowballs. The maximum angular displacement of the signis 25.0° on both sides of the vertical. At a moment when thesign is vertical and moving to the left, a snowball of mass550 g, traveling horizontally with avelocity of 160 cm/s to the right, strikes perpendicularly thelower edge of the sign and sticks there.

(a) Calculate the angular speed of the signimmediately before the impact.
1                rad/s

(b) Calculate its angular speed immediately after the impact.
2   rad/s

(c) The spattered sign will swing up through what maximumangle?
3                    ° (a) Calculate the angular speed of the signimmediately before the impact.
1                rad/s

(b) Calculate its angular speed immediately after the impact.
2   rad/s

(c) The spattered sign will swing up through what maximumangle?
3                    °

Explanation / Answer

Is this information pertaining to before or after the impact? PartA, B, or C?

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