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Bullet hitting a door problem
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[QUOTE="sp3sp2sp, post: 6118087, member: 650108"] [h2]Homework Statement [/h2] A 10 g bullet traveling at 370 m/s strikes a 8.0 kg , 0.80-m-wide door at the edge opposite the hinge. The bullet embeds itself in the door, causing the door to swing open. What is the angular velocity of the door just after impact? Express your answer to two significant figures and include the appropriate units. [h2]Homework Equations[/h2] use conservation of momentum for slab about edge: linear momentum = angular momentum mv = Iw I = (1/3)ML^2 (for a slab) w = (3mv) / (ML^2) (w = omega) [B] 3. The Attempt at a Solution [/B] w = (3mv) / (ML^2) w = (3* 0.01kg * 370m/s) / (8.0kg * 0.80kg^2) w = 2.167 = 2.2 rad/s = wrong cant see what I am doing wrong, thanks for any help [/QUOTE]
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Bullet hitting a door problem
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