A bullet of mass m traveling at velocity v strikes a lock of mass 2m that is attached to a rod of length R.The bellet collides with the block at a right angle and gets stuck in the block.The rod is free to rotate.What is the centripetal acceleration
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![A bullet of mass m traveling at velocity v strikes a lock of mass 2m that is attached to a rod of length R.The bellet collides with the block at a right angle and gets stuck in the block.The rod is free to rotate.What is the centripetal acceleration](/uploads/image/z/2724890-50-0.jpg?t=A+bullet+of+mass+m+traveling+at+velocity+v+strikes+a+lock+of+mass+2m+that+is+attached+to+a+rod+of+length+R.The+bellet+collides+with+the+block+at+a+right+angle+and+gets+stuck+in+the+block.The+rod+is+free+to+rotate.What+is+the+centripetal+acceleration)
A bullet of mass m traveling at velocity v strikes a lock of mass 2m that is attached to a rod of length R.The bellet collides with the block at a right angle and gets stuck in the block.The rod is free to rotate.What is the centripetal acceleration
A bullet of mass m traveling at velocity v strikes a lock of mass 2m that is attached to a rod of length R.The bellet collides with the block at a right angle and gets stuck in the block.The rod is free to rotate.What is the centripetal acceleration of the block after the collision?
答案(1/9)v方/R
A bullet of mass m traveling at velocity v strikes a lock of mass 2m that is attached to a rod of length R.The bellet collides with the block at a right angle and gets stuck in the block.The rod is free to rotate.What is the centripetal acceleration
碰撞过程水平方向动量守恒.
mv=(m+2m)v1 v1=v/3
碰撞后二者合为一,质量为3m,速度为v/3
向心加速度为v1²/R=9v²/R